fix circular import

Matt Sokoloff · Matt Sokoloff · commit 9f6655e96b3d · 2021-04-12T15:16:35.000-04:00
diff --git a/labelbox/schema/role.py b/labelbox/schema/role.py
@@ -68,5 +68,5 @@ class UserRole(Role):
 
 @dataclass
 class ProjectRole:
-    project: Project
+    project: "Project"
     role: Role
