fix(field): prevent early ImportError on Field.type to break

`field.type` gets accessed earlier while there's still a change for
a circular import to happen, which leads to an `ImportError`

During that period it is ok (and correct) to return `UNRESOLVED`

If that also happens later, `UNRESOLVED` will still raise an error
while creating the schema itself.

Fix #779

Author: bellini666

strawberry_django/fields/base.py

@@ -193,7 +193,7 @@ def resolve_type(
 
         try:
             resolved_django_type = get_django_definition(unwrap_type(resolved))
-        except KeyError:
+        except (KeyError, ImportError):
             return UNRESOLVED
 
         if self.origin_django_type and (