Set default for statuscontroller hours as string

src/hydrawise.js

@@ -24,7 +24,7 @@ class Hydrawise {
     return this.request('GET', 'customerdetails', {type: 'controllers'});
   }
 
-  statusschedule(tag = '', hours = 168) {
+  statusschedule(tag = '', hours = '168') {
     return this.request('GET', 'statusschedule', {tag, hours});
   }
 }