Extract & Inline Critical-path CSS in HTML pages
https://github.com/addyosmani/critical/compare/v3.1.0...v4.0.0
https://github.com/addyosmani/critical/compare/v3.0.1...v3.1.0
https://github.com/addyosmani/critical/compare/v3.0.0...v3.0.1
https://github.com/addyosmani/critical/compare/v2.0.6...v3.0.0
https://github.com/addyosmani/critical/compare/v2.0.5...v2.0.6
https://github.com/addyosmani/critical/compare/v2.0.4...v2.0.5
https://github.com/addyosmani/critical/compare/v2.0.3...v2.0.4
https://github.com/addyosmani/critical/compare/v2.0.2...v2.0.3
https://github.com/addyosmani/critical/compare/v2.0.1...v2.0.2
https://github.com/addyosmani/critical/compare/v2.0.0...v2.0.1