message: added xcode 9.3 to build matrix
diff: @@ -220,6 +220,11 @@ matrix:
  osx_image: xcode9.2
  os: osx
  + # Xcode 9.3 Clang
  + - env: COMPILER=clang++ HAS_ASAN_32=true HAS_UBSAN_32=true HAS_ASAN_64=true HAS_UBSAN_64=true
  + osx_image: xcode9.3
  + os: osx
  +
  # OSX GCC 4.9
  - env: COMPILER=g++-4.9 HAS_UBSAN_32=true HAS_ASAN_64=true HAS_UBSAN_64=true # no ASAN_32 - errors when using ASAN_OPTIONS - probably g++ 4.9 bug
  compiler: gcc
  