message: appveyor: Visual Studio 16 2019 x64, Python3.9-x64, antlr4.7
diff: @@ -11,15 +11,22 @@ environment:
  # PATH: $(PYTHON)\Scripts;$(PATH)
  # PLATFORM: x64
  # ANTLR_VER: 4.9
  -
  - - GENERATOR: -G"Visual Studio 15 2017 Win64"
  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
  + - GENERATOR: -G"Visual Studio 16 2019" -A x64
  + APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
  BUILD_TYPE: Release
  PYTHON: "C:\\Python39-x64"
  # add to path otherwise Cython is not found
  PATH: $(PYTHON)\Scripts;$(PATH)
  PLATFORM: x64
  ANTLR_VER: 4.7
  + #- GENERATOR: -G"Visual Studio 15 2017 Win64"
  + # APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
  + # BUILD_TYPE: Release
  + # PYTHON: "C:\\Python39-x64"
  + # # add to path otherwise Cython is not found
  + # PATH: $(PYTHON)\Scripts;$(PATH)
  + # PLATFORM: x64
  + # ANTLR_VER: 4.7
  #- GENERATOR: Ninja
  # APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
  