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
/**
   * Decides whether the previous match is better or not than the current match.  If previous match
   * is null, the newer match is always better.
   *
   * @param previous the previous match
   * @param matcher the newer match
   * @return true if newer match is better, false otherwise
   */
  private static boolean isBetterMatch(String previous, String matcher) {
    return previous == null || matcher.length() >= previous.length();
  }
  /**
   * Heuristic for comparing two platforms.  If platforms (which is not the same thing as operating
   * systems) are found to be approximately similar in nature, this will return true.  For instance
   * the LINUX platform is similar to UNIX, and will give a positive result if compared.
   *
   * @param compareWith the platform to compare with
   * @return true if platforms are approximately similar, false otherwise
   */
  public boolean is(Platform compareWith) {
    return
        
        this == compareWith ||
        
        compareWith == ANY ||
        
        (this.family() != null && this.family().is(compareWith));
  }
  /**
   * Returns a platform that represents a family for the current platform.  For instance