Refactor code-style

Author: wooorm

index.js

@@ -13,7 +13,7 @@ import {toString} from 'nlcst-to-string'
  * @param {NormalizeOptions} [options={}]
  */
 export function normalize(node, options) {
-  var value = (typeof node === 'string' ? node : toString(node))
+  let value = (typeof node === 'string' ? node : toString(node))
     .toLowerCase()
     .replace(/’/g, "'")
 

package.json

@@ -62,11 +62,7 @@
     "trailingComma": "none"
   },
   "xo": {
-    "prettier": true,
-    "rules": {
-      "no-var": "off",
-      "prefer-arrow-callback": "off"
-    }
+    "prettier": true
   },
   "remarkConfig": {
     "plugins": [

test.js

@@ -6,16 +6,16 @@
 import test from 'tape'
 import {normalize} from './index.js'
 
-test('Basic', function (t) {
-  t.throws(function () {
+test('Basic', (t) => {
+  t.throws(() => {
     // @ts-ignore runtime.
     normalize(true)
   }, 'should fail when given a boolean')
 
   t.end()
 })
 
-test('Case', function (t) {
+test('Case', (t) => {
   t.equal(normalize('Dont'), 'dont', 'should normalize case (string)')
 
   t.equal(
@@ -44,7 +44,7 @@ test('Case', function (t) {
   t.end()
 })
 
-test('Apostrophes', function (t) {
+test('Apostrophes', (t) => {
   t.equal(
     normalize("Don't Block-Level"),
     'dont blocklevel',
@@ -290,7 +290,7 @@ test('Apostrophes', function (t) {
   t.end()
 })
 
-test('Dashes', function (t) {
+test('Dashes', (t) => {
   t.equal(
     normalize("Don't Block-Level"),
     'dont blocklevel',