Use return type deduction for timers

Fix updates to Node.js timers types breaking the TypeScript build by
deducing the correct type from the return type of the
setTimeout/setInterval functions.

packages/lib/src/RateLimiter.ts

@@ -30,7 +30,7 @@ export default class RateLimiter {
 	action?: Function;
 
 	private _lastRun = 0;
-	private _runTimeout?: NodeJS.Timeout;
+	private _runTimeout?: ReturnType<typeof setTimeout>;
 
 	/**
 	 * Construct RateLimiter helper

packages/lib/src/helpers.ts

@@ -37,7 +37,7 @@ export async function wait(duration: number) {
  * @param {*=} timeoutResult - Value to return if the operation timed out.
  */
 export async function timeout<T>(promise: Promise<T>, time: number, timeoutResult: T) {
-	let timer: NodeJS.Timer | undefined;
+	let timer: ReturnType<typeof setTimeout> | undefined;
 	try {
 		return await Promise.race([
 			promise,

packages/lib/src/link/connectors.ts

@@ -99,7 +99,7 @@ export abstract class WebSocketBaseConnector extends BaseConnector {
 	_closing = false;
 	_socket: WebSocket | null = null;
 	_lastHeartbeat: number | null = null;
-	_heartbeatId: NodeJS.Timer | null = null;
+	_heartbeatId: ReturnType<typeof setInterval> | null = null;
 	_heartbeatInterval: number | null = null;
 	_lastReceivedSeq = undefined;
 	_sendBuffer: (ReliableMessages)[] = [];
@@ -287,7 +287,7 @@ export abstract class WebSocketBaseConnector extends BaseConnector {
 		this.setClosing();
 		this._sendInternal(new libData.MessageDisconnect("prepare"));
 
-		let timeout: NodeJS.Timeout | undefined;
+		let timeout: ReturnType<typeof setTimeout> | undefined;
 		let waitTimeout = new Promise(resolve => { timeout = setTimeout(resolve, 10000); }); // Make Configurable?
 		try {
 			await Promise.race([
@@ -331,7 +331,7 @@ export abstract class WebSocketBaseConnector extends BaseConnector {
  * @extends module:lib.WebSocketBaseConnector
  */
 export abstract class WebSocketClientConnector extends WebSocketBaseConnector {
-	_reconnectId?: NodeJS.Timeout;
+	_reconnectId?: ReturnType<typeof setTimeout>;
 	_sessionToken: string | null = null;
 	_sessionTimeout: number | null = null;
 	_startedResuming: number | null = null;