fix: use overwrite as string in import project method

vishes-shell · vishes-shell · commit f933cd002ff5 · 2020-02-22T15:39:02.000+03:00
This possibly is temporary solution because httpx raises TypeError when
tries to init DataField with bool value
diff --git a/gitlab/v4/objects.py b/gitlab/v4/objects.py
@@ -4830,7 +4830,7 @@ async def import_project(
             dict: A representation of the import status.
         """
         files = {"file": ("file.tar.gz", file)}
-        data = {"path": path, "overwrite": overwrite}
+        data = {"path": path, "overwrite": "true" if overwrite else "false"}
         if override_params:
             for k, v in override_params.items():
                 data["override_params[%s]" % k] = v
