✨ Add support for Pydantic v2 (while keeping support for v1 if v2 is not available), including initial work by AntonDeMeester (#722)

Co-authored-by: Mohamed Farahat <farahats9@yahoo.com>
Co-authored-by: Stefan Borer <stefan.borer@gmail.com>
Co-authored-by: Peter Landry <peter.landry@gmail.com>
Co-authored-by: Anton De Meester <antondemeester+github@gmail.com>

.github/workflows/test.yml

@@ -27,6 +27,9 @@ jobs:
           - "3.10"
           - "3.11"
           - "3.12"
+        pydantic-version:
+          - pydantic-v1
+          - pydantic-v2
       fail-fast: false
 
     steps:
@@ -57,9 +60,15 @@ jobs:
       - name: Install Dependencies
         if: steps.cache.outputs.cache-hit != 'true'
         run: python -m poetry install
+      - name: Install Pydantic v1
+        if: matrix.pydantic-version == 'pydantic-v1'
+        run: pip install "pydantic>=1.10.0,<2.0.0"
+      - name: Install Pydantic v2
+        if: matrix.pydantic-version == 'pydantic-v2'
+        run: pip install "pydantic>=2.0.2,<3.0.0"
       - name: Lint
         # Do not run on Python 3.7 as mypy behaves differently
-        if: matrix.python-version != '3.7'
+        if: matrix.python-version != '3.7' && matrix.pydantic-version == 'pydantic-v2'
         run: python -m poetry run bash scripts/lint.sh
       - run: mkdir coverage
       - name: Test