Update frontend dependencies (#498)

* update npm packages

* update tsconfig

* remove babelrc, babel presets as well as stable package

* fix svg namespace tag syntax errors

* fix reference error due to namespace and class component having same name

* replace tslint with eslint

* make eslint happier

* update .nvmrc to 14

* update node version to 14 in gh workflow

* fix eslint warnings due to warnings treated as errors on CI (process.env.CI = true)

* pretty fix

* bump node version in Dockerfile

* use createRoot instead of react-dom render

* update browsers list in package.json

frontend/src/Connection.ts

@@ -68,7 +68,7 @@ export class Connection {
       return `wss://${window.location.hostname}/feed/`;
     }
 
-    return `ws://127.0.0.1:8000/feed`;
+    return 'ws://127.0.0.1:8000/feed';
   }
 
   private static async socket(): Promise<WebSocket> {
@@ -89,7 +89,7 @@ export class Connection {
   }
 
   private static async trySocket(): Promise<Maybe<WebSocket>> {
-    return new Promise<Maybe<WebSocket>>((resolve, _) => {
+    return new Promise<Maybe<WebSocket>>((resolve) => {
       function clean() {
         socket.removeEventListener('open', onSuccess);
         socket.removeEventListener('close', onFailure);
@@ -469,7 +469,8 @@ export class Connection {
     let data: FeedMessage.Data;
 
     if (typeof event.data === 'string') {
-      data = (event.data as any) as FeedMessage.Data;
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      data = event.data as any as FeedMessage.Data;
     } else {
       const u8aData = new Uint8Array(event.data);
 
@@ -480,7 +481,8 @@ export class Connection {
 
       const str = Connection.utf8decoder.decode(event.data);
 
-      data = (str as any) as FeedMessage.Data;
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      data = str as any as FeedMessage.Data;
     }
 
     this.handleMessages(FeedMessage.deserialize(data));