diff --git a/package.json b/package.json
index 7d9114c..7d8b073 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
   "homepage": "https://github.com/misund/passes-wcag#readme",
   "devDependencies": {
     "@babel/cli": "7.10.1",
-    "@babel/core": "7.10.2",
+    "@babel/core": "7.12.10",
     "@babel/preset-env": "7.10.2",
     "@babel/register": "7.10.1",
     "eslint": "6.8.0",
diff --git a/yarn.lock b/yarn.lock
index b75b9b7..c427f02 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -17,11 +17,11 @@
   optionalDependencies:
     chokidar "^2.1.8"
 
-"@babel/code-frame@^7.0.0", "@babel/code-frame@^7.10.1":
-  version "7.10.1"
-  resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.10.1.tgz#d5481c5095daa1c57e16e54c6f9198443afb49ff"
+"@babel/code-frame@^7.0.0", "@babel/code-frame@^7.10.4":
+  version "7.10.4"
+  resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.10.4.tgz#168da1a36e90da68ae8d49c0f1b48c7c6249213a"
   dependencies:
-    "@babel/highlight" "^7.10.1"
+    "@babel/highlight" "^7.10.4"
 
 "@babel/compat-data@^7.10.1":
   version "7.10.1"
@@ -31,34 +31,32 @@
     invariant "^2.2.4"
     semver "^5.5.0"
 
-"@babel/core@7.10.2":
-  version "7.10.2"
-  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.10.2.tgz#bd6786046668a925ac2bd2fd95b579b92a23b36a"
-  dependencies:
-    "@babel/code-frame" "^7.10.1"
-    "@babel/generator" "^7.10.2"
-    "@babel/helper-module-transforms" "^7.10.1"
-    "@babel/helpers" "^7.10.1"
-    "@babel/parser" "^7.10.2"
-    "@babel/template" "^7.10.1"
-    "@babel/traverse" "^7.10.1"
-    "@babel/types" "^7.10.2"
+"@babel/core@7.12.10":
+  version "7.12.10"
+  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.12.10.tgz#b79a2e1b9f70ed3d84bbfb6d8c4ef825f606bccd"
+  dependencies:
+    "@babel/code-frame" "^7.10.4"
+    "@babel/generator" "^7.12.10"
+    "@babel/helper-module-transforms" "^7.12.1"
+    "@babel/helpers" "^7.12.5"
+    "@babel/parser" "^7.12.10"
+    "@babel/template" "^7.12.7"
+    "@babel/traverse" "^7.12.10"
+    "@babel/types" "^7.12.10"
     convert-source-map "^1.7.0"
     debug "^4.1.0"
     gensync "^1.0.0-beta.1"
     json5 "^2.1.2"
-    lodash "^4.17.13"
-    resolve "^1.3.2"
+    lodash "^4.17.19"
     semver "^5.4.1"
     source-map "^0.5.0"
 
-"@babel/generator@^7.10.1", "@babel/generator@^7.10.2":
-  version "7.10.2"
-  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.10.2.tgz#0fa5b5b2389db8bfdfcc3492b551ee20f5dd69a9"
+"@babel/generator@^7.12.10":
+  version "7.12.10"
+  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.12.10.tgz#2b188fc329fb8e4f762181703beffc0fe6df3460"
   dependencies:
-    "@babel/types" "^7.10.2"
+    "@babel/types" "^7.12.10"
     jsesc "^2.5.1"
-    lodash "^4.17.13"
     source-map "^0.5.0"
 
 "@babel/helper-annotate-as-pure@^7.10.1":
@@ -133,12 +131,26 @@
     "@babel/template" "^7.10.1"
     "@babel/types" "^7.10.1"
 
+"@babel/helper-function-name@^7.10.4":
+  version "7.10.4"
+  resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.10.4.tgz#d2d3b20c59ad8c47112fa7d2a94bc09d5ef82f1a"
+  dependencies:
+    "@babel/helper-get-function-arity" "^7.10.4"
+    "@babel/template" "^7.10.4"
+    "@babel/types" "^7.10.4"
+
 "@babel/helper-get-function-arity@^7.10.1":
   version "7.10.1"
   resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.10.1.tgz#7303390a81ba7cb59613895a192b93850e373f7d"
   dependencies:
     "@babel/types" "^7.10.1"
 
+"@babel/helper-get-function-arity@^7.10.4":
+  version "7.12.10"
+  resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.12.10.tgz#b158817a3165b5faa2047825dfa61970ddcc16cf"
+  dependencies:
+    "@babel/types" "^7.12.10"
+
 "@babel/helper-hoist-variables@^7.10.1":
   version "7.10.1"
   resolved "https://registry.yarnpkg.com/@babel/helper-hoist-variables/-/helper-hoist-variables-7.10.1.tgz#7e77c82e5dcae1ebf123174c385aaadbf787d077"
@@ -151,23 +163,37 @@
   dependencies:
     "@babel/types" "^7.10.1"
 
+"@babel/helper-member-expression-to-functions@^7.12.1":
+  version "7.12.7"
+  resolved "https://registry.yarnpkg.com/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.12.7.tgz#aa77bd0396ec8114e5e30787efa78599d874a855"
+  dependencies:
+    "@babel/types" "^7.12.7"
+
 "@babel/helper-module-imports@^7.10.1":
   version "7.10.1"
   resolved "https://registry.yarnpkg.com/@babel/helper-module-imports/-/helper-module-imports-7.10.1.tgz#dd331bd45bccc566ce77004e9d05fe17add13876"
   dependencies:
     "@babel/types" "^7.10.1"
 
-"@babel/helper-module-transforms@^7.10.1":
-  version "7.10.1"
-  resolved "https://registry.yarnpkg.com/@babel/helper-module-transforms/-/helper-module-transforms-7.10.1.tgz#24e2f08ee6832c60b157bb0936c86bef7210c622"
+"@babel/helper-module-imports@^7.12.1":
+  version "7.12.5"
+  resolved "https://registry.yarnpkg.com/@babel/helper-module-imports/-/helper-module-imports-7.12.5.tgz#1bfc0229f794988f76ed0a4d4e90860850b54dfb"
   dependencies:
-    "@babel/helper-module-imports" "^7.10.1"
-    "@babel/helper-replace-supers" "^7.10.1"
-    "@babel/helper-simple-access" "^7.10.1"
-    "@babel/helper-split-export-declaration" "^7.10.1"
-    "@babel/template" "^7.10.1"
-    "@babel/types" "^7.10.1"
-    lodash "^4.17.13"
+    "@babel/types" "^7.12.5"
+
+"@babel/helper-module-transforms@^7.10.1", "@babel/helper-module-transforms@^7.12.1":
+  version "7.12.1"
+  resolved "https://registry.yarnpkg.com/@babel/helper-module-transforms/-/helper-module-transforms-7.12.1.tgz#7954fec71f5b32c48e4b303b437c34453fd7247c"
+  dependencies:
+    "@babel/helper-module-imports" "^7.12.1"
+    "@babel/helper-replace-supers" "^7.12.1"
+    "@babel/helper-simple-access" "^7.12.1"
+    "@babel/helper-split-export-declaration" "^7.11.0"
+    "@babel/helper-validator-identifier" "^7.10.4"
+    "@babel/template" "^7.10.4"
+    "@babel/traverse" "^7.12.1"
+    "@babel/types" "^7.12.1"
+    lodash "^4.17.19"
 
 "@babel/helper-optimise-call-expression@^7.10.1":
   version "7.10.1"
@@ -175,6 +201,12 @@
   dependencies:
     "@babel/types" "^7.10.1"
 
+"@babel/helper-optimise-call-expression@^7.10.4":
+  version "7.12.10"
+  resolved "https://registry.yarnpkg.com/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.12.10.tgz#94ca4e306ee11a7dd6e9f42823e2ac6b49881e2d"
+  dependencies:
+    "@babel/types" "^7.12.10"
+
 "@babel/helper-plugin-utils@^7.0.0", "@babel/helper-plugin-utils@^7.10.1", "@babel/helper-plugin-utils@^7.8.0":
   version "7.10.1"
   resolved "https://registry.yarnpkg.com/@babel/helper-plugin-utils/-/helper-plugin-utils-7.10.1.tgz#ec5a5cf0eec925b66c60580328b122c01230a127"
@@ -210,6 +242,15 @@
     "@babel/traverse" "^7.10.1"
     "@babel/types" "^7.10.1"
 
+"@babel/helper-replace-supers@^7.12.1":
+  version "7.12.5"
+  resolved "https://registry.yarnpkg.com/@babel/helper-replace-supers/-/helper-replace-supers-7.12.5.tgz#f009a17543bbbbce16b06206ae73b63d3fca68d9"
+  dependencies:
+    "@babel/helper-member-expression-to-functions" "^7.12.1"
+    "@babel/helper-optimise-call-expression" "^7.10.4"
+    "@babel/traverse" "^7.12.5"
+    "@babel/types" "^7.12.5"
+
 "@babel/helper-simple-access@^7.10.1":
   version "7.10.1"
   resolved "https://registry.yarnpkg.com/@babel/helper-simple-access/-/helper-simple-access-7.10.1.tgz#08fb7e22ace9eb8326f7e3920a1c2052f13d851e"
@@ -217,15 +258,27 @@
     "@babel/template" "^7.10.1"
     "@babel/types" "^7.10.1"
 
+"@babel/helper-simple-access@^7.12.1":
+  version "7.12.1"
+  resolved "https://registry.yarnpkg.com/@babel/helper-simple-access/-/helper-simple-access-7.12.1.tgz#32427e5aa61547d38eb1e6eaf5fd1426fdad9136"
+  dependencies:
+    "@babel/types" "^7.12.1"
+
 "@babel/helper-split-export-declaration@^7.10.1":
   version "7.10.1"
   resolved "https://registry.yarnpkg.com/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.10.1.tgz#c6f4be1cbc15e3a868e4c64a17d5d31d754da35f"
   dependencies:
     "@babel/types" "^7.10.1"
 
-"@babel/helper-validator-identifier@^7.10.1":
-  version "7.10.1"
-  resolved "https://registry.yarnpkg.com/@babel/helper-validator-identifier/-/helper-validator-identifier-7.10.1.tgz#5770b0c1a826c4f53f5ede5e153163e0318e94b5"
+"@babel/helper-split-export-declaration@^7.11.0":
+  version "7.11.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.11.0.tgz#f8a491244acf6a676158ac42072911ba83ad099f"
+  dependencies:
+    "@babel/types" "^7.11.0"
+
+"@babel/helper-validator-identifier@^7.10.4":
+  version "7.10.4"
+  resolved "https://registry.yarnpkg.com/@babel/helper-validator-identifier/-/helper-validator-identifier-7.10.4.tgz#a78c7a7251e01f616512d31b10adcf52ada5e0d2"
 
 "@babel/helper-wrap-function@^7.10.1":
   version "7.10.1"
@@ -236,25 +289,25 @@
     "@babel/traverse" "^7.10.1"
     "@babel/types" "^7.10.1"
 
-"@babel/helpers@^7.10.1":
-  version "7.10.1"
-  resolved "https://registry.yarnpkg.com/@babel/helpers/-/helpers-7.10.1.tgz#a6827b7cb975c9d9cef5fd61d919f60d8844a973"
+"@babel/helpers@^7.12.5":
+  version "7.12.5"
+  resolved "https://registry.yarnpkg.com/@babel/helpers/-/helpers-7.12.5.tgz#1a1ba4a768d9b58310eda516c449913fe647116e"
   dependencies:
-    "@babel/template" "^7.10.1"
-    "@babel/traverse" "^7.10.1"
-    "@babel/types" "^7.10.1"
+    "@babel/template" "^7.10.4"
+    "@babel/traverse" "^7.12.5"
+    "@babel/types" "^7.12.5"
 
-"@babel/highlight@^7.10.1":
-  version "7.10.1"
-  resolved "https://registry.yarnpkg.com/@babel/highlight/-/highlight-7.10.1.tgz#841d098ba613ba1a427a2b383d79e35552c38ae0"
+"@babel/highlight@^7.10.4":
+  version "7.10.4"
+  resolved "https://registry.yarnpkg.com/@babel/highlight/-/highlight-7.10.4.tgz#7d1bdfd65753538fabe6c38596cdb76d9ac60143"
   dependencies:
-    "@babel/helper-validator-identifier" "^7.10.1"
+    "@babel/helper-validator-identifier" "^7.10.4"
     chalk "^2.0.0"
     js-tokens "^4.0.0"
 
-"@babel/parser@^7.10.1", "@babel/parser@^7.10.2":
-  version "7.10.2"
-  resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.10.2.tgz#871807f10442b92ff97e4783b9b54f6a0ca812d0"
+"@babel/parser@^7.12.10", "@babel/parser@^7.12.7":
+  version "7.12.10"
+  resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.12.10.tgz#824600d59e96aea26a5a2af5a9d812af05c3ae81"
 
 "@babel/plugin-proposal-async-generator-functions@^7.10.1":
   version "7.10.1"
@@ -722,34 +775,34 @@
   dependencies:
     regenerator-runtime "^0.13.4"
 
-"@babel/template@^7.10.1":
-  version "7.10.1"
-  resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.10.1.tgz#e167154a94cb5f14b28dc58f5356d2162f539811"
+"@babel/template@^7.10.1", "@babel/template@^7.10.4", "@babel/template@^7.12.7":
+  version "7.12.7"
+  resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.12.7.tgz#c817233696018e39fbb6c491d2fb684e05ed43bc"
   dependencies:
-    "@babel/code-frame" "^7.10.1"
-    "@babel/parser" "^7.10.1"
-    "@babel/types" "^7.10.1"
+    "@babel/code-frame" "^7.10.4"
+    "@babel/parser" "^7.12.7"
+    "@babel/types" "^7.12.7"
 
-"@babel/traverse@^7.10.1":
-  version "7.10.1"
-  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.10.1.tgz#bbcef3031e4152a6c0b50147f4958df54ca0dd27"
+"@babel/traverse@^7.10.1", "@babel/traverse@^7.12.1", "@babel/traverse@^7.12.10", "@babel/traverse@^7.12.5":
+  version "7.12.10"
+  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.12.10.tgz#2d1f4041e8bf42ea099e5b2dc48d6a594c00017a"
   dependencies:
-    "@babel/code-frame" "^7.10.1"
-    "@babel/generator" "^7.10.1"
-    "@babel/helper-function-name" "^7.10.1"
-    "@babel/helper-split-export-declaration" "^7.10.1"
-    "@babel/parser" "^7.10.1"
-    "@babel/types" "^7.10.1"
+    "@babel/code-frame" "^7.10.4"
+    "@babel/generator" "^7.12.10"
+    "@babel/helper-function-name" "^7.10.4"
+    "@babel/helper-split-export-declaration" "^7.11.0"
+    "@babel/parser" "^7.12.10"
+    "@babel/types" "^7.12.10"
     debug "^4.1.0"
     globals "^11.1.0"
-    lodash "^4.17.13"
+    lodash "^4.17.19"
 
-"@babel/types@^7.10.1", "@babel/types@^7.10.2", "@babel/types@^7.4.4":
-  version "7.10.2"
-  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.10.2.tgz#30283be31cad0dbf6fb00bd40641ca0ea675172d"
+"@babel/types@^7.10.1", "@babel/types@^7.10.2", "@babel/types@^7.10.4", "@babel/types@^7.11.0", "@babel/types@^7.12.1", "@babel/types@^7.12.10", "@babel/types@^7.12.5", "@babel/types@^7.12.7", "@babel/types@^7.4.4":
+  version "7.12.10"
+  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.12.10.tgz#7965e4a7260b26f09c56bcfcb0498af1f6d9b260"
   dependencies:
-    "@babel/helper-validator-identifier" "^7.10.1"
-    lodash "^4.17.13"
+    "@babel/helper-validator-identifier" "^7.10.4"
+    lodash "^4.17.19"
     to-fast-properties "^2.0.0"
 
 "@samverschueren/stream-to-observable@^0.3.0":
@@ -2844,9 +2897,9 @@ lodash.zip@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/lodash.zip/-/lodash.zip-4.2.0.tgz#ec6662e4896408ed4ab6c542a3990b72cc080020"
 
-lodash@^4.17.11, lodash@^4.17.12, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15:
-  version "4.17.15"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
+lodash@^4.17.11, lodash@^4.17.12, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.19:
+  version "4.17.20"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
 
 log-symbols@2.2.0:
   version "2.2.0"
@@ -3920,7 +3973,7 @@ resolve-url@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/resolve-url/-/resolve-url-0.2.1.tgz#2c637fe77c893afd2a663fe21aa9080068e2052a"
 
-resolve@^1.10.0, resolve@^1.13.1, resolve@^1.15.1, resolve@^1.17.0, resolve@^1.3.2:
+resolve@^1.10.0, resolve@^1.13.1, resolve@^1.15.1, resolve@^1.17.0:
   version "1.17.0"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.17.0.tgz#b25941b54968231cc2d1bb76a79cb7f2c0bf8444"
   dependencies: