Directly use xvfb-run instead of (flaky) setup-xvfb actions in github…

… actions (#294)

* Try new xvfb action

* Test calling xvfb-run directly

.github/workflows/performance.yml

@@ -61,10 +61,8 @@ jobs:
         run: ninja -j 4 jt_performance
 
       - name: Execute Performance Test
-        uses: GabrielBB/xvfb-action@v1
-        with:
-          working-directory: ${{github.workspace}}/test/integration/performance
-          run: ./jt_performance --benchmark_format=json --benchmark_out=benchmark_result.json
+        working-directory: ${{github.workspace}}/test/integration/performance
+        run: xvfb-run ./jt_performance --benchmark_format=json --benchmark_out=benchmark_result.json
 
       - name: Store benchmark result
         uses: benchmark-action/github-action-benchmark@v1

.github/workflows/test_verification.yml

@@ -59,10 +59,8 @@ jobs:
         run: jackd -d dummy &
 
       - name: Test
-        uses: GabrielBB/xvfb-action@v1
-        with:
-          run: ./jt_tests --gtest_shuffle
-          working-directory: ${{github.workspace}}/build/test/unit/jt_test
+        run: xvfb-run ./jt_tests --gtest_shuffle
+        working-directory: ${{github.workspace}}/build/test/unit/jt_test
 
   LinuxSDL:
     runs-on: ubuntu-latest
@@ -108,10 +106,8 @@ jobs:
         run: ninja
 
       - name: Test
-        uses: GabrielBB/xvfb-action@v1
-        with:
-          run: ./jt_tests
-          working-directory: ${{github.workspace}}/build/test/unit/jt_test
+        run: xvfb-run ./jt_tests
+        working-directory: ${{github.workspace}}/build/test/unit/jt_test
 
   WindowsSFML:
     runs-on: windows-2019