Add tests to the GitHub workflow

Author: Crypto137

.github/workflows/nightly-release-windows-x64.yml

@@ -19,6 +19,8 @@ jobs:
       run: dotnet restore MHServerEmu.sln
     - name: Build
       run: dotnet build MHServerEmu.sln --no-restore --configuration Release
+    - name: Run tests
+      run: dotnet test MHServerEmu.sln --no-restore --no-build --configuration Release
     - name: Get current date
       run: echo "DATE=$(date +'%Y%m%d')" >> $env:GITHUB_ENV
     - name: Upload artifact