change os version for github testing workflow

update version

build files

update dependencies

fix css perspective value

Merge pull request #3 from 4awka-4a9/master

removed DS_Store file

fixed new lines

fixed fullscreen

remove custom eslint rules

downgrade eslint version

update corejs version in babel config

replace ignores with ignorePatterns in eslint config

remove eslintignore

remove stylelint indentation rule