remove use of var

src/helpers/create_index.js

@@ -1,4 +1,4 @@
-var schema = {
+const schema = {
   payload: { type: 'object', enabled: false },
   priority: { type: 'short' },
   timeout: { type: 'long' },

src/index.js

@@ -25,7 +25,7 @@ export default class Esqueue extends events.EventEmitter {
   }
 
   _initTasks() {
-    var initTasks = [
+    const initTasks = [
       this.client.ping({ timeout: 3000 }),
     ];