fix pydantic dependency (#3715)

* fix pydantic dependency

pydantic>=2.0时，str不能为None

* remove extra space

Author: Netrvin

setup.py

@@ -59,6 +59,7 @@
     "paddlespeech_feat",
     "praatio>=5.0.0, <=5.1.1",
     "prettytable",
+    "pydantic>=1.10.14, <2.0",
     "pypinyin<=0.44.0",
     "pypinyin-dict",
     "python-dateutil",