refactor: Upgrade to ESLint 5

BREAKING CHANGE: This config now builds on top of ESLint 5. This
also affects other `peerDependencies` like certain plugins.

examples/eslint/node8/.eslintrc.js

@@ -10,7 +10,7 @@ module.exports = Object.assign({
       },
       rules: {
         'node/no-unsupported-features': [2, {
-          version: 8,
+          version: '8.3.0',
           ignores: ['modules'],
         }],
       },

lib/basics.js

@@ -41,11 +41,8 @@ module.exports = {
     node: true,
   },
   parserOptions: {
-    ecmaVersion: 2017,
+    ecmaVersion: 2018,
     sourceType: 'script',
-    ecmaFeatures: {
-      experimentalObjectRestSpread: true,
-    },
   },
   plugins: ['import', 'mocha', 'node', 'prettier'],
 };

node8.js

@@ -45,6 +45,6 @@ module.exports = Object.assign(basics, {
     // Additional conventions
 
     // Additional mistakes
-    'node/no-unsupported-features': [2, { version: 8 }],
+    'node/no-unsupported-features': [2, { version: '8.3.0' }],
   }),
 });

package.json

@@ -25,23 +25,23 @@
     }
   },
   "peerDependencies": {
-    "eslint-plugin-import": "^2.2.0",
-    "eslint-plugin-mocha": "^4.12.1",
-    "eslint-plugin-node": "^5.1.1",
-    "eslint-plugin-prettier": "^2.2.0",
-    "eslint": "^4.5.0"
+    "eslint-plugin-import": "^2.8.0",
+    "eslint-plugin-mocha": "^5.1.0",
+    "eslint-plugin-node": "^7.0.1",
+    "eslint-plugin-prettier": "^2.6.2",
+    "eslint": "^5.1.0"
   },
   "dependencies": {},
   "devDependencies": {
-    "assertive": "^2.1.0",
-    "eslint": "^4.7.1",
+    "assertive": "^3.0.0",
+    "eslint": "^5.1.0",
     "eslint-plugin-import": "^2.8.0",
-    "eslint-plugin-mocha": "^4.12.1",
-    "eslint-plugin-node": "^5.1.1",
-    "eslint-plugin-prettier": "^2.2.0",
-    "globby": "^6.1.0",
-    "mocha": "^3.5.0",
-    "nlm": "^3.3.0",
+    "eslint-plugin-mocha": "^5.1.0",
+    "eslint-plugin-node": "^7.0.1",
+    "eslint-plugin-prettier": "^2.6.2",
+    "globby": "^8.0.1",
+    "mocha": "^5.2.0",
+    "nlm": "^3.3.1",
     "prettier": "^1.6.1"
   },
   "author": {

test/lint.test.js

@@ -51,7 +51,7 @@ async function validate(filename, content) {
 
 describe(`Linting using ESLint`, () => {
   const files = globby.sync(`examples/**/*.{mjs,js}`, {
-    ignore: 'examples/node_modules/**/*.*',
+    ignore: ['examples/node_modules/**/*.*'],
   });
 
   files.forEach(testFile => {