Add RelWithDebInfo and Debug build types to GitHub actions

.github/workflows/build.yml

@@ -7,11 +7,11 @@ jobs:
       fail-fast: false
       matrix:
         os: [windows-latest, macos-latest, ubuntu-latest]
-        build_type: [debug]
+        build_type: [RelWithDebInfo, Debug]
         enable_ui: [off]
         include:
           - os: ubuntu-latest
-            build_type: debug
+            build_type: Debug
             enable_ui: on
     steps:
     - uses: actions/checkout@v2
@@ -42,6 +42,7 @@ jobs:
           export enable_ccache=on
         fi
         cmake -S . -B build -G Ninja \
+          -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
           -DCMAKE_OSX_DEPLOYMENT_TARGET=10.9 \
           -DENABLE_TESTS=ON \
           -DENABLE_UI=${{ matrix.enable_ui }} \