Update eslint & plugins

Also replace eslint-plugin-node with the maintained eslint-plugin-n

app/.eslintrc.yml

@@ -6,4 +6,4 @@ parserOptions:
   sourceType: module
 
 rules:
-  node/no-unsupported-features: off
+  n/no-unsupported-features: off

app/storage.js

@@ -110,7 +110,7 @@ class Storage {
   }
 
   set user(info) {
-    return this.engine.setItem('user', JSON.stringify(info));
+    this.engine.setItem('user', JSON.stringify(info));
   }
 
   getFileById(id) {

app/streams.js

@@ -1,5 +1,3 @@
-/* global TransformStream */
-
 export function transformStream(readable, transformer, oncancel) {
   try {
     return readable.pipeThrough(new TransformStream(transformer));