Update linting dependencies.

Author: rwjblue

.eslintrc.js

@@ -13,13 +13,12 @@ module.exports = {
   extends: [
     'eslint:recommended',
     'plugin:node/recommended',
-    'prettier',
+    'plugin:prettier/recommended',
   ],
   env: {
     node: true
   },
   rules: {
-    'prettier/prettier': 'error',
     'node/no-unsupported-features': ['error', { ignores: ['modules'] }],
   },
 

package.json

@@ -53,12 +53,12 @@
   "devDependencies": {
     "broccoli-test-helper": "^2.0.0",
     "coveralls": "^3.1.0",
-    "eslint": "^6.4.0",
-    "eslint-config-prettier": "^6.3.0",
+    "eslint": "^7.20.0",
+    "eslint-config-prettier": "^7.2.0",
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-prettier": "^3.3.1",
     "jest": "^26.6.3",
-    "prettier": "^1.18.2",
+    "prettier": "^2.2.1",
     "qunit": "^2.14.0",
     "release-it": "^14.4.0",
     "release-it-lerna-changelog": "^3.1.0",