add missing file

Author: Matt Sokoloff

labelbox/data/serialization/coco/path.py

@@ -0,0 +1,9 @@
+from pydantic import BaseModel
+from pathlib import Path
+
+
+class PathSerializerMixin(BaseModel):
+
+    def dict(self, *args, **kwargs):
+        res = super().dict(*args, **kwargs)
+        return {k: str(v) if isinstance(v, Path) else v for k, v in res.items()}