build: Relax pydantic version (#215)

Author: ptiurin

setup.cfg

@@ -29,7 +29,7 @@ install_requires =
     async-property==0.2.1
     cryptography>=3.4.0
     httpx[http2]==0.23.0
-    pydantic[dotenv]==1.8.2
+    pydantic[dotenv]>=1.8.2,<1.10
     readerwriterlock==1.0.9
     sqlparse>=0.4.2
 python_requires = >=3.7