Use let and const instead of var

Author: tniezurawski

README.md

@@ -11,11 +11,11 @@ ember install ember-buffered-proxy
 ```js
 import BufferedProxy from 'ember-buffered-proxy/proxy';
 
-var content = {
+let content = {
   firstName: 'stefan'
 };
 
-var buffer = BufferedProxy.create({
+let buffer = BufferedProxy.create({
   content: content
 });
 
@@ -86,11 +86,11 @@ Or you can grab the mixin directly
 ```js
 import BufferedMixin from 'ember-buffered-proxy/mixin';
 
-var content = {
+let content = {
   firstName: 'stefan'
 };
 
-var buffer = ObjectProxy.extend(BufferedMixin).create({
+let buffer = ObjectProxy.extend(BufferedMixin).create({
   content: content
 });
 

addon/helpers.js

@@ -1,4 +1,4 @@
-var hasOwnProp = Object.prototype.hasOwnProperty;
+const hasOwnProp = Object.prototype.hasOwnProperty;
 
 export function aliasMethod(methodName) {
   return function() {
@@ -7,7 +7,7 @@ export function aliasMethod(methodName) {
 }
 
 export function empty(obj) {
-  var key;
+  let key;
   for (key in obj) {
     if (!hasOwnProp.call(obj, key)) { continue; }
     return false;