add back gtest

Author: revmischa

.github/workflows/release.yml

@@ -148,13 +148,18 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y libgl1-mesa-dev mesa-common-dev libsdl2-dev libglm-dev ninja-build cmake g++ zip
+      - name: Build GoogleTest
+        run: |
+          git clone https://github.com/projectM-visualizer/build-gtest.git build-gtest
+          cd build-gtest && ./setup.sh && ./build-emscripten.sh
       - name: Configure
         run: emcmake cmake \
           -S . -B build \
           -DCMAKE_BUILD_TYPE=Release \
           -DCMAKE_INSTALL_PREFIX=install \
           -DCMAKE_VERBOSE_MAKEFILE=YES \
           -DBUILD_TESTING=OFF \
+          -DGTest_DIR="${{ github.workspace }}/build-gtest/dist/emscripten/lib/lib/cmake/GTest" \
           -DBUILD_SHARED_LIBS=OFF
       - name: Build & Install
         run: |