Add build step for running tests against [email protected]

Author: phillipdupuis

.github/workflows/cicd.yml

@@ -48,9 +48,11 @@ jobs:
       - name: Run tests against 'pydantic@latest'
         run: |
           python -m pytest --cov=pydantic2ts --cov-append
-      - name: Run tests using 'pydantic==1.*.*'
+      - name: Run tests against 'pydantic==1.8.2'
+        if: ${{ matrix.os == 'ubuntu-latest' && matrix.python-version == '3.8' }}
         run: |
-          python -m pip install 'pydantic<2'
+          python -m pip install 'pydantic==1.8.2'
+          python -m pip install -U .
           python -m pytest --cov=pydantic2ts --cov-append
       - name: Combine coverage data
         run: |