message: appveyor: fix cmake params
diff: @@ -20,7 +20,7 @@ install:
  - "cd antlr4/runtime/Cpp"
  - "mkdir build"
  - "cd build"
  - - 'cmake -G "Visual Studio 16 2019" -DWITH_STATIC_CRT=Off -DCMAKE_BUILD_TYPE=Release ..' -Dgtest_force_shared_crt=ON
  + - 'cmake -G "Visual Studio 16 2019" -DWITH_STATIC_CRT=Off -DCMAKE_BUILD_TYPE=Release -Dgtest_force_shared_crt=ON ..'
  - "msbuild LIBANTLR4.sln /p:configuration=Release" # for other configuration installation does not work currently
  - "cmake -P cmake_install.cmake"
  - "cd ../../../../"
  