Notable changes

Added

• Add party hook messages to JavaScript runtime.
• Add In-App Purchase notification callback functions to the server runtimes.
• Add "DeleteAccount" before and after hook functions to the server runtimes.

Changed

• Accept the leaderboard operator types in their expanded string name.

Fixed

• Update Type definition for "authenticateTokenGenerate" to support the optional params allowed by the server.
• Make public the "ChannelMessageRemove" function to the server Go runtime.
• Allow DELETE method to be used in HTTP requests.