I understand this is a recent update to MacOS but just wanted get this on the roadmap if it hasn't been tackled already. Thanks :)

## Environments
__OS:__  OSX
__Selenium Version:__  Selenium server standalone <= 3.14.0
__Browser:__  Any
__Browser Version:__ Any

## Expected Behavior
Selenium Grid hub routes webdriver traffic to specified `platform[Name]: macos 10.14` or `mojave`

## Actual Behavior
No current support for node platform target MacOS 10.14 Mojave.
Desired capabilities `platform[Name]` set to `macos 10.14` or `mojave` fails to find corresponding selenium node.
__Workaround:__
Disable all other MacOS platform nodes and target `platform[Name]: "MAC"`

## Steps to reproduce -
Create a selenium grid with OSX 10.12/13 and 10.14.
Run tests with desired capabilities `platform[Name]: "mojave"`.

## Reference
Known and Supported Platforms that WebDriver runs on: 
https://github.com/SeleniumHQ/selenium/blob/master/java/client/src/org/openqa/selenium/Platform.java
Doesn't include identifier for MacOSX 10.14 Mojave
return WINDOWS;
    }
  },
  WIN8_1("windows 8.1", "win8.1") {
    @Override
    public Platform family() {
      return WINDOWS;
    }
  },
  WIN10("windows 10", "win10") {
    @Override
    public Platform family() {
      return WINDOWS;
    }
  },
  MAC("mac", "darwin", "macOS", "mac os x", "os x") {
    @Override
    public Platform family() {
      return null;
    }
  },
  SNOW_LEOPARD("snow leopard", "os x 10.6", "macos 10.6") {
    @Override
    public Platform family() {
      return MAC;
    }
    @Override
    public String toString() {
      return "OS X 10.6";
    }