Add docs-assets/css/docs.css to csslint too.
README.md: switch to the shields.io dependency badges theme.
Update dependencies.
Merge pull request #12020 from XhmikosR/package

Update dependencies.
Merge pull request #12019 from XhmikosR/badge

Change david-dm theme to make README badges uniform
Merge pull request #12021 from XhmikosR/master

Add docs-assets/css/docs.css to csslint too.