Run CI for non-master pushes/PRs

Disables the requirement of merging into master to run the ci.

Test Plan:
- Create a pr against a non master branch and verify the ci runs
    - Push to a non master branch and verify the ci runs

Reviewers: Keavon

Reviewed By: Keavon

Pull Request: https://github.com/GraphiteEditor/Graphite/pull/1166

.github/workflows/ci.yml

@@ -2,10 +2,8 @@ name: Continuous Integration
 
 on:
   push:
-    branches: [ master ]
 
   pull_request:
-    branches: [ master ]
 
 env:
   CARGO_TERM_COLOR: always