Sync lint configs

test-app/.eslintrc.js

@@ -1,58 +1,19 @@
 'use strict';
 
+const { configs } = require('@nullvoxpopuli/eslint-configs');
+
+// accommodates: JS, TS, App, and Addon
+const config = configs.ember();
+
 module.exports = {
-  root: true,
-  parser: 'babel-eslint',
-  parserOptions: {
-    ecmaVersion: 2018,
-    sourceType: 'module',
-    ecmaFeatures: {
-      legacyDecorators: true,
-    },
-  },
-  plugins: ['ember'],
-  extends: [
-    'eslint:recommended',
-    'plugin:ember/recommended',
-    'plugin:prettier/recommended',
-  ],
-  env: {
-    browser: true,
-  },
-  rules: {},
+  ...config,
   overrides: [
-    // node files
+    ...config.overrides,
     {
-      files: [
-        './.eslintrc.js',
-        './.prettierrc.js',
-        './.template-lintrc.js',
-        './ember-cli-build.js',
-        './testem.js',
-        './blueprints/*/index.js',
-        './config/**/*.js',
-        './lib/*/index.js',
-        './server/**/*.js',
-      ],
-      parserOptions: {
-        sourceType: 'script',
-      },
-      env: {
-        browser: false,
-        node: true,
-      },
-      plugins: ['node'],
-      extends: ['plugin:node/recommended'],
+      files: ['**/*.js', '**/*.ts'],
       rules: {
-        // this can be removed once the following is fixed
-        // https://github.com/mysticatea/eslint-plugin-node/issues/77
-        'node/no-unpublished-require': 'off',
+        'prettier/prettier': ['error', require('./.prettierrc')],
       },
     },
-    {
-      // test files
-      files: ['tests/**/*-test.{js,ts}'],
-      extends: ['plugin:qunit/recommended'],
-    },
   ],
 };

test-app/tests/test-helper.js

@@ -1,10 +1,11 @@
-import Application from 'test-app/app';
-import config from 'test-app/config/environment';
-import * as QUnit from 'qunit';
 import { setApplication } from '@ember/test-helpers';
+import * as QUnit from 'qunit';
 import { setup } from 'qunit-dom';
 import { start } from 'ember-qunit';
 
+import Application from 'test-app/app';
+import config from 'test-app/config/environment';
+
 setApplication(Application.create(config.APP));
 
 setup(QUnit.assert);

test-app/types/global.d.ts

@@ -1,6 +1,6 @@
 // Types for compiled templates
 declare module 'test-app/templates/*' {
-  import { TemplateFactory } from 'htmlbars-inline-precompile';
+  import type { TemplateFactory } from 'htmlbars-inline-precompile';
   const tmpl: TemplateFactory;
   export default tmpl;
 }

test-app/types/test-app/index.d.ts

@@ -1,4 +1,4 @@
-import Ember from 'ember';
+import type Ember from 'ember';
 
 declare global {
   // Prevents ESLint from "fixing" this via its auto-fix to turn it into a type