Authentication Polling and Typed Requests

This is a pre-release for 5.x.x which features properly typed http requests for TypeScript and an option for polling the authentication function until a LeagueClientUx process has been found.

Added

• request<T> will now properly return a Response<T> whose .json() method will return a T.
• authenticate now has options to awaitConnection, searching until a LeagueClientUx has been found.
• Running the library in an environment which the LeagueClient cannot run on will now throw a InvalidPlatformError upon calls to authenticate.

Fixes

• Fixed a bug where LeagueWebSocket's subscriptions would attach twice upon registration
• Removed unnecessary fs-extra dependency

Breaking Changes

• Credentials interface no longer returns HTTP protocol, process pid or process name.
  • This is because the new implementation uses the process command line arguments to retrieve password/port instead of the lockfile process. (see https://www.hextechdocs.dev/lol/lcuapi/6.getting-started-with-the-lcu-api#getting-the-port-number-and-the-password)
• LeagueWebSocket no longer has a getListeners() method, instead, the subscriptions property is a public.
  • The properly is no longer an object, the implementation now uses a Map.