fix: lock pydantic version (#270)

Author: stepansergeevitch

setup.cfg

@@ -28,7 +28,7 @@ install_requires =
     appdirs-stubs>=0.1.0
     cryptography>=3.4.0
     httpx[http2]==0.24.0
-    pydantic[dotenv]>=1.8.2
+    pydantic[dotenv]>=1.8.2,<2.0
     python-dateutil>=2.8.2
     readerwriterlock==1.0.9
     sqlparse>=0.4.2