First deploy to NuGet (#15)

* Added NuGet publish

* Updated to only deploy when release is merged

Author: csharpfritz

.github/workflows/build.yaml

@@ -76,15 +76,15 @@ jobs:
         echo "RELNOTES=$relnotes" | Out-File -FilePath $Env:GITHUB_ENV -Encoding utf-8 -Append
 
     - name: Push to NuGet
-      if: ${{ github.ref == 'refs/heads/release' }}
+      if: github.event_name == 'pull_request' && github.event.action == 'closed' && github.event.pull_request.merged == true && github.ref == 'refs/heads/release'
       run: dotnet nuget push **/*.nupkg -k ${{ secrets.NUGET_API_KEY }} -s https://api.nuget.org/v3/index.json --skip-duplicate
 
     - name: Tag and Release
-      if: ${{ github.ref == 'refs/heads/release' && github.event_name != 'pull_request' }}
+      if: github.event_name == 'pull_request' && github.event.action == 'closed' && github.event.pull_request.merged == true && github.ref == 'refs/heads/release'
       id: tag_release
       uses: softprops/action-gh-release@v0.1.13
       with:
         body: ${{ env.RELNOTES }}
         tag_name: ${{ env.PKG_VERSION }}
         files: |
-          **/*.nupkg
+          **/*.nupkg