Add end-to-end test

Add an end-to-end test that adds a new provider to the AspNet.Security.OAuth.Providers project.

Author: martincostello

.github/workflows/build.yml

@@ -33,6 +33,11 @@ jobs:
       run: |
         npm ci
 
+    - name: Setup .NET SDK
+      uses: actions/setup-dotnet@v3
+      with:
+        dotnet-version: '7.0.x'
+
     - name: Test
       run: |
         npm test