lint fixes after lint packages upgrade

Author: koddsson

.eslintrc.json

@@ -8,6 +8,13 @@
     "RemoteInputElement": "readable"
   },
   "overrides": [
+    {
+      "files": "*.js",
+      "parser": "espree",
+      "parserOptions": {
+        "ecmaVersion": "2020"
+      }
+    },
     {
       "files": "test/**/*.js",
       "rules": {

src/index.ts

@@ -63,6 +63,8 @@ function makeAbortController() {
   if ('AbortController' in window) {
     return new AbortController()
   }
+
+  // eslint-disable-next-line @typescript-eslint/no-empty-function
   return {signal: null, abort() {}}
 }