fix: emit resume event, silent disconnects, error event param (#3192)

* src: Fix shardResumed event not being emitted

* docs: Document Client#error again

* src: Fix onError due to incorrect typings

* src: handle onError properly for both uws and ws

* src: Try to fix silent disconnects when using uWs

* fix(WebSocketShard): uws emits plain objects, not errors

Emitting line of code: https://github.com/discordjs/uws/blob/39aa429f94d9668608f69848b3a84db3a3e92914/src/uws.js#L80-L83
Listener attaching is here: https://github.com/discordjs/uws/blob/master/src/uws.js#L128
For reference, found a clue here: https://github.com/discordjs/discord.js/issues/1528

typings/index.d.ts

@@ -1339,7 +1339,7 @@ declare module 'discord.js' {
 		private connect(): Promise<void>;
 		private onOpen(): void;
 		private onMessage(event: MessageEvent): void;
-		private onError(error: ErrorEvent): void;
+		private onError(error: ErrorEvent | object): void;
 		private onClose(event: CloseEvent): void;
 		private onPacket(packet: object): void;
 		private setHelloTimeout(time?: number): void;