fix(urljoin): 2 and 3 compatible (#15401)

diff --git a/erpnext/hub_node/api.py b/erpnext/hub_node/api.py
index 0492dde..2356401 100644
--- a/erpnext/hub_node/api.py
+++ b/erpnext/hub_node/api.py
@@ -184,7 +184,7 @@
 
 
 def convert_relative_image_urls_to_absolute(items):
-	from urlparse import urljoin
+	from six.moves.urllib.parse import urljoin
 
 	for item in items:
 		file_path = item['image']