Improve linting

[Hypnosphi]

What I did

— Fixed existing lint warnings
— Switched remark to quite mode to remove all the "this file is OK" noise
— Added --report-unused-disable-directive option to lint:js script, so that we don't use more disablings than we actually need
— Optimised eslint config: removed rules that duplicate airbnb config, fully ignored rules conflicting with Prettier
— Stopped ignoring accessibility rules and fixed all the violations
— Included .storybook and other previously ignored paths into linting

How to test

$ yarn lint
yarn run v1.3.2
$ yarn lint:js . && yarn lint:ts **/*.ts && yarn lint:md .
$ cross-env NODE_ENV=production eslint --cache --cache-location=.cache/eslint --ext .js,.jsx,.json --report-unused-disable-directives .
$ tslint -p . -c tslint.json -t stylish '**/*.ts'
$ remark -q .
✨  Done in 10.34s.

[igor-dv]

what is this file needed for ?

[Hypnosphi]

Looks like @danielduan forgot to remove it