fix: filelock import (#469)

Author: maharshivpatel

print_designer/install.py

@@ -7,7 +7,7 @@
 
 import click
 import frappe
-from frappe.monitor import filelock
+from frappe.utils.synchronization import filelock
 import requests
 from frappe.custom.doctype.custom_field.custom_field import create_custom_fields
 from frappe.custom.doctype.property_setter.property_setter import make_property_setter