Obvious eslint fixes

Author: musale

.editorconfig

@@ -0,0 +1,15 @@
+# http://editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+insert_final_newline = false
+trim_trailing_whitespace = false

.eslintignore

@@ -2,5 +2,5 @@
 *.js.map
 *.d.ts
 
-node_modules
-dist
+node_modules/
+dist/

.eslintrc.js

@@ -1,35 +1,44 @@
 module.exports = {
-    "env": {
-        "browser": true,
-        "es2021": true,
-        "node": true
+    env: {
+      browser: true,
+      es6: true,
+      node: true
     },
-    "extends": [
-        "eslint:recommended",
-        "plugin:@typescript-eslint/recommended"
-    ],
-    "overrides": [
-        {
-            "env": {
-                "node": true
-            },
-            "files": [
-                ".eslintrc.{js,cjs}"
-            ],
-            "parserOptions": {
-                "sourceType": "script"
-            }
-        }
-    ],
-    "parser": "@typescript-eslint/parser",
-    "parserOptions": {
-        "ecmaVersion": "latest",
-        "sourceType": "module"
+    extends: ['@microsoft/eslint-config-msgraph'],
+    parser: '@typescript-eslint/parser',
+    parserOptions: {
+      project: [
+        'packages/abstractions/tsconfig.json',
+        'packages/authentication/azure/tsconfig.json',
+        'packages/authentication/azure/tsconfig.json',
+        'packages/http/fetch/tsconfig.json',
+        'packages/serialization/form/tsconfig.json',
+        'packages/serialization/json/tsconfig.json',
+        'packages/serialization/multipart/tsconfig.json',
+        'packages/authentication/azure/tsconfig.json',
+        'packages/test/tsconfig.json'
+      ],
+      sourceType: 'module'
     },
-    "plugins": [
-        "@typescript-eslint"
-    ],
-    "rules": {
-        "@typescript-eslint/consistent-type-imports": "error"
+    plugins: ['eslint-plugin-jsdoc', 'eslint-plugin-prefer-arrow', 'eslint-plugin-react', '@typescript-eslint', 'header'],
+    root: true,
+    ignorePatterns: ['.eslintrc.js', '*.mjs'],
+    rules: {
+      '@typescript-eslint/no-explicit-any': 'warn',
+      // prefer-nullish-coalescing requires strictNullChecking to be turned on
+      '@typescript-eslint/prefer-nullish-coalescing': 'off',
+      'header/header': [
+        2,
+        'block',
+        [
+          '*',
+          ' * -------------------------------------------------------------------------------------------',
+          ' * Copyright (c) Microsoft Corporation.  All Rights Reserved.  Licensed under the MIT License.',
+          ' * See License in the project root for license information.',
+          ' * -------------------------------------------------------------------------------------------',
+          ' '
+        ],
+        1
+      ]
     }
-}
+  };