Release to NuGet whenever a version number tag is pushed.

.github/workflows/release.yml

@@ -0,0 +1,19 @@
+name: Release
+on:
+  push:
+    tags:
+    - '*.*.*'
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - name: Build and Test
+      run: pwsh ./build.ps1
+    - name: Release to NuGet
+      env:
+        NUGET_API_KEY: ${{ secrets.NUGET_API_KEY }}
+      run: pwsh ./release.ps1

release.ps1

@@ -0,0 +1,2 @@
+dotnet nuget push artifacts/*.nupkg --source https://api.nuget.org/v3/index.json --api-key $env.NUGET_API_KEY
+if ($lastexitcode -ne 0) { throw $lastexitcode }