remove pydantic dependency (#17)

* remove pydantic dependency

* updating mypy and dropping support for Python 3.10

Author: defreng

.github/workflows/ci.yml

@@ -73,7 +73,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11"]
+        python-version: ["3.11"]
 
     steps:
       - uses: actions/checkout@v3