Update TypeScript, Prettier and typescript-eslint for new TypeScript 3.8 syntax

ts/textsecure/TaskWithTimeout.ts

@@ -15,8 +15,9 @@ export default function createTaskWithTimeout<T>(
       let complete = false;
       let timer: NodeJS.Timeout | null = setTimeout(() => {
         if (!complete) {
-          const message = `${id ||
-            ''} task did not complete in time. Calling stack: ${
+          const message = `${
+            id || ''
+          } task did not complete in time. Calling stack: ${
             errorForStack.stack
           }`;
 

ts/textsecure/WebSocket.ts

@@ -5,7 +5,8 @@ import { w3cwebsocket } from 'websocket';
 
 type ModifiedEventSource = Omit<EventSource, 'onerror'>;
 
-declare class ModifiedWebSocket extends w3cwebsocket
+declare class ModifiedWebSocket
+  extends w3cwebsocket
   implements ModifiedEventSource {
   withCredentials: boolean;
 
@@ -17,4 +18,5 @@ declare class ModifiedWebSocket extends w3cwebsocket
 }
 
 export type WebSocket = ModifiedWebSocket;
+// eslint-disable-next-line @typescript-eslint/no-redeclare
 export const WebSocket = w3cwebsocket as typeof ModifiedWebSocket;