task: added testing step to build

Author: dtanglr

.github/workflows/dotnet.yml

@@ -28,5 +28,5 @@ jobs:
       run: dotnet restore Primitively.sln
     - name: Build
       run: dotnet build Primitively.sln --no-restore
-    #- name: Test
-    #  run: dotnet test --no-build --verbosity normal
+    - name: Test
+      run: dotnet test --no-build --verbosity normal