install applications that are needed for coverage in CI

Author: Totto16

.github/workflows/test.yml

@@ -40,7 +40,7 @@ jobs:
       - name: Install dependencies (Linux)
         run: |
           sudo apt-get update
-          sudo apt-get install ninja-build libsdl2-2.0-0 libsdl2-dev libsdl2-ttf* libsdl2-mixer* libsdl2-image* -y
+          sudo apt-get install ninja-build libsdl2-2.0-0 libsdl2-dev libsdl2-ttf* libsdl2-mixer* libsdl2-image* lcov gcovr -y
 
 
       - name: Configure