only close Serialport if also open to prevent exception

* update dependencies, support nodejs 12+14

* remove node 8, add node 14

* update dependencies, bump version

* update dependencies, bump version

* linting

* * only close Serialport if also open to prevent exception (https://sentry.iobroker.net/share/issue/c6f155165ff44551bda467e8ebc81d86/)
* catch and re-emit error events for serialport and tcp to allow users of this library to react on errors and not end in an uncatchable exception (https://sentry.iobroker.net/share/issue/f7bfb42f5ebf414d85b5b5d56a530595/)
* prepare changes as 0.14.1

* * update package-lock

* * make linter happy

Co-authored-by: hobbyquaker <bastiraff@googlemail.com>

linting

bump version

Update README.md

tests, fs20 cmd

refactoring, hms parse, fs20 parse and cmd

fixed readme