Limit pydantic to v1

It appears v2 has breaking changes which we need to adjust for later.

Signed-off-by: Sahas Subramanian <[email protected]>

Author: shsms

pyproject.toml

@@ -34,7 +34,7 @@ dependencies = [
     "pandas >= 1.5.2, < 2",
     "protobuf >= 4.21, < 5",
     "pyarrow >= 10.0.1, < 11",
-    "pydantic >= 1.9",
+    "pydantic >= 1.9, < 2",
     "sympy >= 1.10.1, < 2",
     "toml >= 0.10",
     "tqdm >= 4.38.0, < 5",