Breaking: modernize syntax and bump standard (Level/community#98)

Author: vweevers

errors.js

@@ -1,6 +1,6 @@
-var createError = require('errno').create
-var LevelUPError = createError('LevelUPError')
-var NotFoundError = createError('NotFoundError', LevelUPError)
+const createError = require('errno').create
+const LevelUPError = createError('LevelUPError')
+const NotFoundError = createError('NotFoundError', LevelUPError)
 
 NotFoundError.prototype.notFound = true
 NotFoundError.prototype.status = 404

package.json

@@ -20,7 +20,7 @@
     "hallmark": "^3.1.0",
     "level-community": "^3.0.0",
     "nyc": "^14.0.0",
-    "standard": "^14.0.0",
+    "standard": "^16.0.3",
     "tape": "^5.0.1"
   },
   "hallmark": {

test.js

@@ -1,9 +1,9 @@
-var test = require('tape')
-var errors = require('./')
+const test = require('tape')
+const errors = require('./')
 
 test('all errors are instances of LevelUPError', function (t) {
-  var LevelUPError = errors.LevelUPError
-  var keys = Object.keys(errors)
+  const LevelUPError = errors.LevelUPError
+  const keys = Object.keys(errors)
 
   keys.forEach(function (key) {
     t.ok(new errors[key]() instanceof LevelUPError)
@@ -13,7 +13,7 @@ test('all errors are instances of LevelUPError', function (t) {
 })
 
 test('NotFoundError has special properties', function (t) {
-  var error = new errors.NotFoundError()
+  const error = new errors.NotFoundError()
   t.equal(error.notFound, true)
   t.equal(error.status, 404)
   t.end()