message: Support for Catalyst in Realm-JS
  Realm JS uses ios.toolchain.cmake to generate an xcode project that
  builds the realm-js library.  This requires that additional platform
  flags are added in order to support Catalyst.
diff: @@ -11,9 +11,10 @@ set(CPACK_SYSTEM_NAME "ios")
  set(CMAKE_OSX_SYSROOT "iphoneos")
  -set(CMAKE_XCODE_ATTRIBUTE_SUPPORTED_PLATFORMS "iphoneos iphonesimulator")
  -set(CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphoneos;-iphonesimulator")
  +set(CMAKE_XCODE_ATTRIBUTE_SUPPORTED_PLATFORMS "iphoneos iphonesimulator macosx")
  +set(CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphoneos;-iphonesimulator;-maccatalyst")
  set(CMAKE_XCODE_ATTRIBUTE_IPHONEOS_DEPLOYMENT_TARGET "9.0")
  +set(CMAKE_XCODE_ATTRIBUTE_MACOSX_DEPLOYMENT_TARGET "10.15")
  set(CMAKE_XCODE_ATTRIBUTE_CODE_SIGN_IDENTITY "")
  set(CMAKE_XCODE_ATTRIBUTE_CODE_SIGNING_REQUIRED "NO")
  