Run dotnet test; if on branch master, also build and publish NuGet package to GitHub Package Registry

dotnet-test-and-publish.yml

name: Run .NET Core tests
on: [push]
jobs:
  build:
    name: Build and test
    runs-on: ubuntu-latest    
    steps:
    - uses: actions/checkout@v2
    - uses: actions/setup-dotnet@v1
    - run: dotnet test
  nuget-publish:
    name: Publish package to GPR
    runs-on: ubuntu-latest
    needs: build
    if: contains(github.ref, 'master')
    steps:
    - uses: einaregilsson/build-number@v2
      id: buildnumber
      with:
        token: ${{ secrets.GITHUB_TOKEN }}
    - uses: actions/checkout@v2
    - uses: actions/setup-dotnet@v1
      with:
        source-url: https://nuget.pkg.github.com/YOUR_ORGANIZATION/index.json
      env:
        NUGET_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}
    - run: dotnet pack --configuration Release /p:Version=1.1.0.$BUILD_NUMBER --output $GITHUB_WORKSPACE
    - run: dotnet nuget push $GITHUB_WORKSPACE/*.nupkg
    - uses: actions/create-release@v1
      env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        tag_name: 1.1.0.${{ steps.buildnumber.outputs.build_number }}
        release_name: Release 1.1.0.${{ steps.buildnumber.outputs.build_number }}