fix(maintenance-visit): change fieldtype of status to select

erpnext/maintenance/doctype/maintenance_visit/maintenance_visit.json

@@ -701,7 +701,7 @@
    "columns": 0, 
    "default": "Draft", 
    "fieldname": "status", 
-   "fieldtype": "Data", 
+   "fieldtype": "Select", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
    "ignore_xss_filter": 0, 
@@ -1001,7 +1001,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2018-08-21 14:44:44.911402", 
+ "modified": "2020-07-15 14:44:44.911402", 
  "modified_by": "Administrator", 
  "module": "Maintenance", 
  "name": "Maintenance Visit",