message: added xcode 11
diff: @@ -241,6 +241,11 @@ matrix:
  osx_image: xcode10.2
  os: osx
  + # Xcode 11.2 Clang
  + - env: COMPILER=clang++ HAS_ASAN=true HAS_UBSAN=true HAS_TSAN=true
  + osx_image: xcode11.2
  + os: osx
  +
  # OSX LLVM-GCC
  - env: COMPILER=g++ HAS_ASAN=true HAS_TSAN=true
  compiler: gcc
  