Replace TravisCI ReadMe Badge with GithubActions (#3159)
Replace TravisCI ReadMe Badge with GithubActions (#3159)

* Add Github Action badge for master branch status

* Change build label and remove logo

* Remove legacy travis build status badge
spotify/luigi,riga/luigi,riga/luigi,riga/luigi,dlstadther/luigi,spotify/luigi,dlstadther/luigi,dlstadther/luigi,spotify/luigi,spotify/luigi,riga/luigi,dlstadther/luigi