Added build command to CI

Author: islero

.github/workflows/ci.yml

@@ -124,6 +124,9 @@ jobs:
       - name: Restore dependencies
         run: dotnet restore
 
+      - name: Build
+        run: dotnet build src/Backtest.Net/Backtest.Net.csproj --configuration Release --no-restore
+
       - name: Determine version
         id: version
         run: |