Update eslint dependencies (#124)

Author: rekmarks

.eslintrc.js

@@ -14,16 +14,25 @@ module.exports = {
   parserOptions: {
     ecmaVersion: 2018,
   },
-  ignorePatterns: [
-    '!.eslintrc.js',
-    'node_modules/',
-  ],
+  rules: {
+    'node/no-sync': 'off',
+  },
   overrides: [
     {
       files: ['test/mocks/**'],
       rules: {
         'no-empty-function': 'off',
       },
     },
+    {
+      files: ['test/**'],
+      rules: {
+        'node/no-callback-literal': 'off',
+      },
+    },
+  ],
+  ignorePatterns: [
+    '!.eslintrc.js',
+    'node_modules/',
   ],
 }

package.json

@@ -42,12 +42,13 @@
     "safe-event-emitter": "^1.0.1"
   },
   "devDependencies": {
-    "@metamask/eslint-config": "^3.1.0",
+    "@metamask/eslint-config": "^4.1.0",
     "@types/jest": "^26.0.5",
-    "eslint": "^6.8.0",
+    "eslint": "^7.15.0",
     "eslint-plugin-import": "^2.20.2",
     "eslint-plugin-jest": "^23.18.0",
     "eslint-plugin-json": "^2.0.1",
+    "eslint-plugin-node": "^11.1.0",
     "jest": "^26.1.0"
   }
 }