message: Updates macOS host image on Azure from High Sierra to Mojave
  See:
diff: @@ -54,7 +54,7 @@ strategy:
  TEST_TARGET: 'linux_clang6'
  HOST_CONFIG: 'docker-linux-ubuntu16.04-x86_64-clang@6.0.0'
  osx_gcc:
  - VM_ImageName: 'macos-10.13'
  + VM_ImageName: 'macos-10.14'
  CMAKE_EXTRA_FLAGS: '-DAXOM_ENABLE_SIDRE=Off'
  TEST_TARGET: 'osx_gcc'
  windows:
  