# Changelog

All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.

### [15.3.1](https://www.github.com/yargs/yargs/compare/v15.3.0...v15.3.1) (2020-03-16)

### Bug Fixes

* \_\_proto\_\_ will now be replaced with \_\_\_proto\_\_\_ in parse ([#258](https://www.github.com/yargs/yargs-parser/issues/258)), patching a potential
prototype pollution vulnerability. This was reported by the Snyk Security Research Team. ([63810ca](https://www.github.com/yargs/yargs-parser/commit/63810ca1ae1a24b08293a4d971e70e058c7a41e2))

## [15.3.0](https://www.github.com/yargs/yargs/compare/v15.2.0...v15.3.0) (2020-03-08)

### Features

* **yargs-parser:** introduce single-digit boolean aliases ([#1576](https://www.github.com/yargs/yargs/issues/1576)) ([3af7f04](https://www.github.com/yargs/yargs/commit/3af7f04cdbfcbd4b3f432aca5144d43f21958c39))
* add usage for single-digit boolean aliases ([#1580](https://www.github.com/yargs/yargs/issues/1580)) ([6014e39](https://www.github.com/yargs/yargs/commit/6014e39bca3a1e8445aa0fb2a435f6181e344c45))

### Bug Fixes

* address ambiguity between nargs of 1 and requiresArg ([#1572](https://www.github.com/yargs/yargs/issues/1572)) ([a5edc32](https://www.github.com/yargs/yargs/commit/a5edc328ecb3f90d1ba09cfe70a0040f68adf50a))

## [15.2.0](https://www.github.com/yargs/yargs/compare/v15.1.0...v15.2.0) (2020-03-01)

### ⚠ BREAKING CHANGES

* **deps:** yargs-parser@17.0.0 no longer implicitly creates arrays out of boolean
arguments when duplicates are provided

### Features

* **completion:** takes negated flags into account when boolean-negation is set ([#1509](https://www.github.com/yargs/yargs/issues/1509)) ([7293ad5](https://www.github.com/yargs/yargs/commit/7293ad50d20ea0fb7dd1ac9b925e90e1bd95dea8))
* **deps:** pull in yargs-parser@17.0.0 ([#1553](https://www.github.com/yargs/yargs/issues/1553)) ([b9409da](https://www.github.com/yargs/yargs/commit/b9409da199ebca515a848489c206b807fab2e65d))
* deprecateOption ([#1559](https://www.github.com/yargs/yargs/issues/1559)) ([8aae333](https://www.github.com/yargs/yargs/commit/8aae3332251d09fa136db17ef4a40d83fa052bc4))
* display appropriate $0 for electron apps ([#1536](https://www.github.com/yargs/yargs/issues/1536)) ([d0e4379](https://www.github.com/yargs/yargs/commit/d0e437912917d6a66bb5128992fa2f566a5f830b))
* introduces strictCommands() subset of strict mode ([#1540](https://www.github.com/yargs/yargs/issues/1540)) ([1d4cca3](https://www.github.com/yargs/yargs/commit/1d4cca395a98b395e6318f0505fc73bef8b01350))
* **deps:** yargs-parser with 'greedy-array' configuration ([#1569](https://www.github.com/yargs/yargs/issues/1569)) ([a03a320](https://www.github.com/yargs/yargs/commit/a03a320dbf5c0ce33d829a857fc04a651c0bb53e))

### Bug Fixes

* help always displayed for the first command parsed having an async handler ([#1535](https://www.github.com/yargs/yargs/issues/1535)) ([d585b30](https://www.github.com/yargs/yargs/commit/d585b303a43746201b05c9c9fda94a444634df33))
* **deps:** fix enumeration for normalized path arguments ([#1567](https://www.github.com/yargs/yargs/issues/1567)) ([0b5b1b0](https://www.github.com/yargs/yargs/commit/0b5b1b0e5f4f9baf393c48e9cc2bc85c1b67a47a))
* **locales:** only translate default option group name ([acc16de](https://www.github.com/yargs/yargs/commit/acc16de6b846ea7332db753646a9cec76b589162))
* **locales:** remove extra space in French for 'default' ([#1564](https://www.github.com/yargs/yargs/issues/1564)) ([ecfc2c4](https://www.github.com/yargs/yargs/commit/ecfc2c474575c6cdbc6d273c94c13181bd1dbaa6))
* **translations:** add French translation for unknown command ([#1563](https://www.github.com/yargs/yargs/issues/1563)) ([18b0b75](https://www.github.com/yargs/yargs/commit/18b0b752424bf560271e670ff95a0f90c8386787))
* **translations:** fix pluralization in error messages. ([#1557](https://www.github.com/yargs/yargs/issues/1557)) ([94fa38c](https://www.github.com/yargs/yargs/commit/94fa38cbab8d86943e87bf41d368ed56dffa6835))
* **yargs:** correct support of bundled electron apps ([#1554](https://www.github.com/yargs/yargs/issues/1554)) ([a0b61ac](https://www.github.com/yargs/yargs/commit/a0b61ac21e2b554aa73dbf1a66d4a7af94047c2f))

## [15.1.0](https://www.github.com/yargs/yargs/compare/v15.0.2...v15.1.0) (2020-01-02)

### Features

* **lang:** add Finnish localization (language code fi) ([222c8fe](https://www.github.com/yargs/yargs/commit/222c8fef2e2ad46e314c337dec96940f896bec35))
* complete short options with a single dash ([#1507](https://www.github.com/yargs/yargs/issues/1507)) ([99011ab](https://www.github.com/yargs/yargs/commit/99011ab5ba90232506ece0a17e59e2001a1ab562))
* onFinishCommand handler ([#1473](https://www.github.com/yargs/yargs/issues/1473)) ([fe380cd](https://www.github.com/yargs/yargs/commit/fe380cd356aa33aef0449facd59c22cab8930ac9))

### Bug Fixes

* getCompletion() was not working for options ([#1495](https://www.github.com/yargs/yargs/issues/1495)) ([463feb2](https://www.github.com/yargs/yargs/commit/463feb2870158eb9df670222b0f0a40a05cf18d0))
* misspelling of package.json `engines` field ([0891d0e](https://www.github.com/yargs/yargs/commit/0891d0ed35b30c83a6d9e9f6a5c5f84d13c546a0))
* populate positionals when unknown-options-as-args is set ([#1508](https://www.github.com/yargs/yargs/issues/1508)) ([bb0f2eb](https://www.github.com/yargs/yargs/commit/bb0f2eb996fa4e19d330b31a01c2036cafa99a7e)), closes [#1444](https://www.github.com/yargs/yargs/issues/1444)
* show 2 dashes on help for single digit option key or alias ([#1493](https://www.github.com/yargs/yargs/issues/1493)) ([63b3dd3](https://www.github.com/yargs/yargs/commit/63b3dd31a455d428902220c1992ae930e18aff5c))
* **docs:** use recommended cjs import syntax for ts examples ([#1513](https://www.github.com/yargs/yargs/issues/1513)) ([f9a18bf](https://www.github.com/yargs/yargs/commit/f9a18bfd624a5013108084f690cd8a1de794c430))

### [15.0.2](https://www.github.com/yargs/yargs/compare/v15.0.1...v15.0.2) (2019-11-19)

### Bug Fixes

* temporary fix for libraries that call Object.freeze() ([#1483](https://www.github.com/yargs/yargs/issues/1483)) ([99c2dc8](https://www.github.com/yargs/yargs/commit/99c2dc850e67c606644f8b0c0bca1a59c87dcbcd))

### [15.0.1](https://www.github.com/yargs/yargs/compare/v15.0.0...v15.0.1) (2019-11-16)

### Bug Fixes

* **deps:** cliui, find-up, and string-width, all drop Node 6 support ([#1479](https://www.github.com/yargs/yargs/issues/1479)) ([6a9ebe2](https://www.github.com/yargs/yargs/commit/6a9ebe2d955e3e979e76c07ffbb1c17fef64cb49))

## [15.0.0](https://www.github.com/yargs/yargs/compare/v14.2.0...v15.0.0) (2019-11-10)

### ⚠ BREAKING CHANGES

* **deps:** yargs-parser now throws on invalid combinations of config (#1470)
* yargs-parser@16.0.0 drops support for Node 6
* drop Node 6 support (#1461)
* remove package.json-based parserConfiguration (#1460)

### Features

* **deps:** yargs-parser now throws on invalid combinations of config ([#1470](https://www.github.com/yargs/yargs/issues/1470)) ([c10c38c](https://www.github.com/yargs/yargs/commit/c10c38cca04298f96b55a7e374a9a134abefffa7))
* expose `Parser` from `require('yargs/yargs')` ([#1477](https://www.github.com/yargs/yargs/issues/1477)) ([1840ba2](https://www.github.com/yargs/yargs/commit/1840ba22f1a24c0ece8e32bbd31db4134a080aee))

### Bug Fixes

* **docs:** TypeScript import to prevent a future major release warning ([#1441](https://www.github.com/yargs/yargs/issues/1441)) ([b1b156a](https://www.github.com/yargs/yargs/commit/b1b156a3eb4ddd6803fbbd56c611a77919293000))
* stop-parse was not being respected by commands ([#1459](https://www.github.com/yargs/yargs/issues/1459)) ([12c82e6](https://www.github.com/yargs/yargs/commit/12c82e62663e928148a7ee2f51629aa26a0f9bb2))
* update to yargs-parser with fix for array default values ([#1463](https://www.github.com/yargs/yargs/issues/1463)) ([ebee59d](https://www.github.com/yargs/yargs/commit/ebee59d9022da538410e69a5c025019ed46d13d2))
* **docs:** update boolean description and examples in docs ([#1474](https://www.github.com/yargs/yargs/issues/1474)) ([afd5b48](https://www.github.com/yargs/yargs/commit/afd5b4871bfeb90d58351ac56c5c44a83ef033e6))

### Miscellaneous Chores

* drop Node 6 support ([#1461](https://www.github.com/yargs/yargs/issues/1461)) ([2ba8ce0](https://www.github.com/yargs/yargs/commit/2ba8ce05e8fefbeffc6cb7488d9ebf6e86cceb1d))

### Code Refactoring

* remove package.json-based parserConfiguration ([#1460](https://www.github.com/yargs/yargs/issues/1460)) ([0d3642b](https://www.github.com/yargs/yargs/commit/0d3642b6f829b637938774c0c6ce5f6bfe1afa51))

## [14.2.0](https://github.com/yargs/yargs/compare/v14.1.0...v14.2.0) (2019-10-07)

### Bug Fixes

* async middleware was called twice ([#1422](https://github.com/yargs/yargs/issues/1422)) ([9a42b63](https://github.com/yargs/yargs/commit/9a42b63))
* fix promise check to accept any spec conform object ([#1424](https://github.com/yargs/yargs/issues/1424)) ([0be43d2](https://github.com/yargs/yargs/commit/0be43d2))
* groups were not being maintained for nested commands ([#1430](https://github.com/yargs/yargs/issues/1430)) ([d38650e](https://github.com/yargs/yargs/commit/d38650e))
* **docs:** broken markdown link ([#1426](https://github.com/yargs/yargs/issues/1426)) ([236e24e](https://github.com/yargs/yargs/commit/236e24e))
* support merging deeply nested configuration ([#1423](https://github.com/yargs/yargs/issues/1423)) ([bae66fe](https://github.com/yargs/yargs/commit/bae66fe))

### Features

* **deps:** introduce yargs-parser with support for unknown-options-as-args ([#1440](https://github.com/yargs/yargs/issues/1440)) ([4d21520](https://github.com/yargs/yargs/commit/4d21520))

## [14.1.0](https://github.com/yargs/yargs/compare/v14.0.0...v14.1.0) (2019-09-06)

### Bug Fixes

* **docs:** fix incorrect parserConfiguration documentation ([2a99124](https://github.com/yargs/yargs/commit/2a99124))
* detect zsh when zsh isnt run as a login prompt ([#1395](https://github.com/yargs/yargs/issues/1395)) ([8792d13](https://github.com/yargs/yargs/commit/8792d13))
* populate correct value on yargs.parsed and stop warning on access ([#1412](https://github.com/yargs/yargs/issues/1412)) ([bb0eb52](https://github.com/yargs/yargs/commit/bb0eb52))
* showCompletionScript was logging script twice ([#1388](https://github.com/yargs/yargs/issues/1388)) ([07c8537](https://github.com/yargs/yargs/commit/07c8537))
* strict() should not ignore hyphenated arguments ([#1414](https://github.com/yargs/yargs/issues/1414)) ([b774b5e](https://github.com/yargs/yargs/commit/b774b5e))
* **docs:** formalize existing callback argument to showHelp ([#1386](https://github.com/yargs/yargs/issues/1386)) ([d217764](https://github.com/yargs/yargs/commit/d217764))

### Features

* make it possible to merge configurations when extending other config. ([#1411](https://github.com/yargs/yargs/issues/1411)) ([5d7ad98](https://github.com/yargs/yargs/commit/5d7ad98))

## [14.0.0](https://github.com/yargs/yargs/compare/v13.3.0...v14.0.0) (2019-07-30)

### ⚠ BREAKING CHANGES

* we now only officially support yargs.$0 parameter and discourage direct access to yargs.parsed
* previously to this fix methods like `yargs.getOptions()` contained the state of the last command to execute.
* do not allow additional positionals in strict mode

### Bug Fixes

* calling parse multiple times now appropriately maintains state ([#1137](https://github.com/yargs/yargs/issues/1137)) ([#1369](https://github.com/yargs/yargs/issues/1369)) ([026b151](https://github.com/yargs/yargs/commit/026b151))
* prefer user supplied script name in usage ([#1383](https://github.com/yargs/yargs/issues/1383)) ([28c74b9](https://github.com/yargs/yargs/commit/28c74b9))
* **deps:** use decamelize from npm instead of vendored copy ([#1377](https://github.com/yargs/yargs/issues/1377)) ([015eeb9](https://github.com/yargs/yargs/commit/015eeb9))
* **examples:** fix usage-options.js to reflect current API ([#1375](https://github.com/yargs/yargs/issues/1375)) ([6e5b76b](https://github.com/yargs/yargs/commit/6e5b76b))
* do not allow additional positionals in strict mode ([35d777c](https://github.com/yargs/yargs/commit/35d777c))
* properties accessed on singleton now reflect current state of instance ([#1366](https://github.com/yargs/yargs/issues/1366)) ([409d35b](https://github.com/yargs/yargs/commit/409d35b))
* tolerate null prototype for config objects with `extends` ([#1376](https://github.com/yargs/yargs/issues/1376)) ([3d26d11](https://github.com/yargs/yargs/commit/3d26d11)), closes [#1372](https://github.com/yargs/yargs/issues/1372)
* yargs.parsed now populated before returning, when yargs.parse() called with no args (#1382) ([e3981fd](https://github.com/yargs/yargs/commit/e3981fd)), closes [#1382](https://github.com/yargs/yargs/issues/1382)

### Features

* adds support for multiple epilog messages ([#1384](https://github.com/yargs/yargs/issues/1384)) ([07a5554](https://github.com/yargs/yargs/commit/07a5554))
* allow completionCommand to be set via showCompletionScript ([#1385](https://github.com/yargs/yargs/issues/1385)) ([5562853](https://github.com/yargs/yargs/commit/5562853))

## [13.3.0](https://www.github.com/yargs/yargs/compare/v13.2.4...v13.3.0) (2019-06-10)

### Bug Fixes

* **deps:** yargs-parser update addressing several parsing bugs ([#1357](https://www.github.com/yargs/yargs/issues/1357)) ([e230d5b](https://www.github.com/yargs/yargs/commit/e230d5b))

### Features

* **i18n:** swap out os-locale dependency for simple inline implementation ([#1356](https://www.github.com/yargs/yargs/issues/1356)) ([4dfa19b](https://www.github.com/yargs/yargs/commit/4dfa19b))
* support defaultDescription for positional arguments ([812048c](https://www.github.com/yargs/yargs/commit/812048c))

### [13.2.4](https://github.com/yargs/yargs/compare/v13.2.3...v13.2.4) (2019-05-13)

### Bug Fixes

* **i18n:** rename unclear 'implication failed' to 'missing dependent arguments' ([#1317](https://github.com/yargs/yargs/issues/1317)) ([bf46813](https://github.com/yargs/yargs/commit/bf46813))

### [13.2.3](https://github.com/yargs/yargs/compare/v13.2.2...v13.2.3) (2019-05-05)

### Bug Fixes

* **deps:** upgrade cliui for compatibility with latest chalk. ([#1330](https://github.com/yargs/yargs/issues/1330)) ([b20db65](https://github.com/yargs/yargs/commit/b20db65))
* address issues with dutch translation ([#1316](https://github.com/yargs/yargs/issues/1316)) ([0295132](https://github.com/yargs/yargs/commit/0295132))

### Tests

* accept differently formatted output ([#1327](https://github.com/yargs/yargs/issues/1327)) ([c294d1b](https://github.com/yargs/yargs/commit/c294d1b))

## [13.2.2](https://github.com/yargs/yargs/compare/v13.2.1...v13.2.2) (2019-03-06)

## [13.2.1](https://github.com/yargs/yargs/compare/v13.2.0...v13.2.1) (2019-02-18)

### Bug Fixes

* add zsh script to files array ([3180224](https://github.com/yargs/yargs/commit/3180224))
* support options/sub-commands in zsh completion ([0a96394](https://github.com/yargs/yargs/commit/0a96394))

# [13.2.0](https://github.com/yargs/yargs/compare/v13.1.0...v13.2.0) (2019-02-15)

### Features

* zsh auto completion ([#1292](https://github.com/yargs/yargs/issues/1292)) ([16c5d25](https://github.com/yargs/yargs/commit/16c5d25)), closes [#1156](https://github.com/yargs/yargs/issues/1156)

<a name="13.1.0"></a>

# [13.1.0](https://github.com/yargs/yargs/compare/v13.0.0...v13.1.0) (2019-02-12)

### Features

* add applyBeforeValidation, for applying sync middleware before validation ([5be206a](https://github.com/yargs/yargs/commit/5be206a))

<a name="13.0.0"></a>

# [13.0.0](https://github.com/yargs/yargs/compare/v12.0.5...v13.0.0) (2019-02-02)

### Bug Fixes

* **deps:** Update os-locale to avoid security vulnerability ([#1270](https://github.com/yargs/yargs/issues/1270)) ([27bf739](https://github.com/yargs/yargs/commit/27bf739))
* **validation:** Use the error as a message when none exists otherwise ([#1268](https://github.com/yargs/yargs/issues/1268)) ([0510fe6](https://github.com/yargs/yargs/commit/0510fe6))
* better bash path completion ([#1272](https://github.com/yargs/yargs/issues/1272)) ([da75ea2](https://github.com/yargs/yargs/commit/da75ea2))
* middleware added multiple times due to reference bug ([#1282](https://github.com/yargs/yargs/issues/1282)) ([64af518](https://github.com/yargs/yargs/commit/64af518))

### Chores

* ~drop Node 6 from testing matrix ([#1287](https://github.com/yargs/yargs/issues/1287)) ([ef16792](https://github.com/yargs/yargs/commit/ef16792))~
  * _opting to not drop Node 6 support until April, [see](https://github.com/nodejs/Release)._
* update dependencies ([#1284](https://github.com/yargs/yargs/issues/1284)) ([f25de4f](https://github.com/yargs/yargs/commit/f25de4f))

### Features

* Add `.parserConfiguration()` method, deprecating package.json config ([#1262](https://github.com/yargs/yargs/issues/1262)) ([3c6869a](https://github.com/yargs/yargs/commit/3c6869a))
* adds config option for sorting command output ([#1256](https://github.com/yargs/yargs/issues/1256)) ([6916ce9](https://github.com/yargs/yargs/commit/6916ce9))
* options/positionals with leading '+' and '0' no longer parse as numbers ([#1286](https://github.com/yargs/yargs/issues/1286)) ([e9dc3aa](https://github.com/yargs/yargs/commit/e9dc3aa))
* support promises in middleware ([f3a4e4f](https://github.com/yargs/yargs/commit/f3a4e4f))

### BREAKING CHANGES

* options with leading '+' or '0' now parse as strings
* dropping Node 6 which hits end of life in April 2019
* see [yargs-parser@12.0.0 CHANGELOG](https://github.com/yargs/yargs-parser/blob/master/CHANGELOG.md#breaking-changes)
* we now warn if the yargs stanza package.json is used.

<a name="12.0.5"></a>

## [12.0.5](https://github.com/yargs/yargs/compare/v12.0.4...v12.0.5) (2018-11-19)

### Bug Fixes

* allows camel-case, variadic arguments, and strict mode to be combined ([#1247](https://github.com/yargs/yargs/issues/1247)) ([eacc035](https://github.com/yargs/yargs/commit/eacc035))

<a name="12.0.4"></a>

## [12.0.4](https://github.com/yargs/yargs/compare/v12.0.3...v12.0.4) (2018-11-10)

### Bug Fixes

* don't load config when processing positionals ([5d0dc92](https://github.com/yargs/yargs/commit/5d0dc92))

<a name="12.0.3"></a>

## [12.0.3](https://github.com/yargs/yargs/compare/v12.0.2...v12.0.3) (2018-10-06)

### Bug Fixes

* $0 contains first arg in bundled electron apps ([#1206](https://github.com/yargs/yargs/issues/1206)) ([567820b](https://github.com/yargs/yargs/commit/567820b))
* accept single function for middleware ([66fd6f7](https://github.com/yargs/yargs/commit/66fd6f7)), closes [#1214](https://github.com/yargs/yargs/issues/1214) [#1214](https://github.com/yargs/yargs/issues/1214)
* hide `hidden` options from help output even if they are in a group ([#1221](https://github.com/yargs/yargs/issues/1221)) ([da54028](https://github.com/yargs/yargs/commit/da54028))
* improve Norwegian Bokmål translations ([#1208](https://github.com/yargs/yargs/issues/1208)) ([a458fa4](https://github.com/yargs/yargs/commit/a458fa4))
* improve Norwegian Nynorsk translations ([#1207](https://github.com/yargs/yargs/issues/1207)) ([d422eb5](https://github.com/yargs/yargs/commit/d422eb5))

<a name="12.0.2"></a>

## [12.0.2](https://github.com/yargs/yargs/compare/v12.0.1...v12.0.2) (2018-09-04)

### Bug Fixes

* middleware should work regardless of when method is called  ([664b265](https://github.com/yargs/yargs/commit/664b265)), closes [#1178](https://github.com/yargs/yargs/issues/1178)
* translation not working when using __ with a single parameter ([#1183](https://github.com/yargs/yargs/issues/1183)) ([f449aea](https://github.com/yargs/yargs/commit/f449aea))
* upgrade os-locale to version that addresses license issue ([#1195](https://github.com/yargs/yargs/issues/1195)) ([efc0970](https://github.com/yargs/yargs/commit/efc0970))

<a name="12.0.1"></a>

## [12.0.1](https://github.com/yargs/yargs/compare/v12.0.0...v12.0.1) (2018-06-29)

<a name="12.0.0"></a>

# [12.0.0](https://github.com/yargs/yargs/compare/v11.1.0...v12.0.0) (2018-06-26)

### Bug Fixes

* .argv and .parse() now invoke identical code path ([#1126](https://github.com/yargs/yargs/issues/1126)) ([f13ebf4](https://github.com/yargs/yargs/commit/f13ebf4))
* remove the trailing white spaces from the help output ([#1090](https://github.com/yargs/yargs/issues/1090)) ([3f0746c](https://github.com/yargs/yargs/commit/3f0746c))
* **completion:** Avoid default command and recommendations during completion ([#1123](https://github.com/yargs/yargs/issues/1123)) ([036e7c5](https://github.com/yargs/yargs/commit/036e7c5))

### Chores

* test Node.js 6, 8 and 10 ([#1160](https://github.com/yargs/yargs/issues/1160)) ([84f9d2b](https://github.com/yargs/yargs/commit/84f9d2b))
* upgrade to version of yargs-parser that does not populate value for unset boolean ([#1104](https://github.com/yargs/yargs/issues/1104)) ([d4705f4](https://github.com/yargs/yargs/commit/d4705f4))

### Features

* add support for global middleware, useful for shared tasks like metrics ([#1119](https://github.com/yargs/yargs/issues/1119)) ([9d71ac7](https://github.com/yargs/yargs/commit/9d71ac7))
* allow setting scriptName $0 ([#1143](https://github.com/yargs/yargs/issues/1143)) ([a2f2eae](https://github.com/yargs/yargs/commit/a2f2eae))
* remove `setPlaceholderKeys` ([#1105](https://github.com/yargs/yargs/issues/1105)) ([6ee2c82](https://github.com/yargs/yargs/commit/6ee2c82))

### BREAKING CHANGES

* Options absent from `argv` (not set via CLI argument) are now absent from the parsed result object rather than being set with `undefined`
* drop Node 4 from testing matrix, such that we'll gradually start drifting away from supporting Node 4.
* yargs-parser does not populate 'false' when boolean flag is not passed
* tests that assert against help output will need to be updated

<a name="11.1.0"></a>

# [11.1.0](https://github.com/yargs/yargs/compare/v11.0.0...v11.1.0) (2018-03-04)

### Bug Fixes

* choose correct config directory when require.main does not exist ([#1056](https://github.com/yargs/yargs/issues/1056)) ([a04678c](https://github.com/yargs/yargs/commit/a04678c))

### Features

* allow hidden options to be displayed with --show-hidden ([#1061](https://github.com/yargs/yargs/issues/1061)) ([ea862ae](https://github.com/yargs/yargs/commit/ea862ae))
* extend *.rc files in addition to json ([#1080](https://github.com/yargs/yargs/issues/1080)) ([11691a6](https://github.com/yargs/yargs/commit/11691a6))

<a name="11.0.0"></a>

# [11.0.0](https://github.com/yargs/yargs/compare/v10.1.2...v11.0.0) (2018-01-22)

### Bug Fixes

* Set implicit nargs=1 when type=number requiresArg=true ([#1050](https://github.com/yargs/yargs/issues/1050)) ([2b56812](https://github.com/yargs/yargs/commit/2b56812))

### Features

* requiresArg is now simply an alias for nargs(1) ([#1054](https://github.com/yargs/yargs/issues/1054)) ([a3ddacc](https://github.com/yargs/yargs/commit/a3ddacc))

### BREAKING CHANGES

* requiresArg now has significantly different error output, matching nargs.

[Historical Versions](/docs/CHANGELOG-historical.md)
