* fixes#1723: Github Actions Supported
- This is to switch from Travis CI which is shutting down the org version,
and the .com version, a free account is limited.
- Switch test environment variable from TRAVIS to CI to be more generic.
* Adding jruby-9.2.18.0 to matrix for github actions
* CSS to SCSS
* Fix travis
* Use sprockets
* Use Sprockets helpers
* Fix gollum.editor.js error when changing language
* Fix fileview styles, use same style as Pages View.
* Add keybinding files required by ace and some ace ext files that are required or might be useful.