message: Update mingw-w64 build image to support C++20
diff: @@ -53,7 +53,7 @@ jobs:
  - build
  build-linux-mingw:
  docker:
  - - image: outpostuniverse/nas2d-mingw:1.6
  + - image: outpostuniverse/nas2d-mingw:1.7
  steps:
  - checkout
  - run: git submodule update --init nas2d-core/
  