Update push.yml

.github/workflows/push.yml

@@ -16,14 +16,15 @@ on:
       - 'v[0-9]+.[0-9]+.[0-9]+'
     branches:
       - main
+      - master
 
 jobs:
   test:
     name: Unit Tests
     runs-on: [ ubuntu-latest ]
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 0