message: Use ccache action
diff: @@ -18,8 +18,8 @@ jobs:
  runs-on: ubuntu-20.04
  env:
  - CC: gcc-10
  - CXX: g++-10
  + CC: ccache gcc-10
  + CXX: ccache g++-10
  TREAT_WARNINGS_AS_ERRORS: 1
  GEN: ninja
  @@ -29,7 +29,12 @@ jobs:
  fetch-depth: 0
  - name: Install
  - run: sudo apt-get install ninja-build
  + run: sudo apt-get install ninja-build ccache
  +
  + - name: ccache
  + uses: hendrikmuhs/ccache-action@v1
  + with:
  + key: 1
  - name: Build
  run: make debug
  