Tweaked linting

Packages added in another commit

Author: glenn2223

.eslintrc.json

@@ -1,9 +1,18 @@
 {
     "root": true,
+    "env": {
+        "browser": true,
+        "commonjs": true,
+        "es2021": true,
+        "node": true
+    },
+    "extends": [
+        "eslint:recommended",
+        "plugin:@typescript-eslint/recommended"
+    ],
     "parser": "@typescript-eslint/parser",
     "parserOptions": {
-        "ecmaVersion": 6,
-        "sourceType": "module"
+        "ecmaVersion": 12
     },
     "plugins": [
         "@typescript-eslint"