try to install pydantic using pip

Author: alixdamman

.github/workflows/python-package-conda.yml

@@ -28,9 +28,6 @@ jobs:
         auto-update-conda: true
         environment-file: environment.yml
         python-version: ${{ matrix.python-version }}
-    # versions <= 1.5 of pydantic are not available with Python 3.9
-    - run: conda install "pydantic <= 1.5"
-      if: ${{ matrix.python-version != 3.9 }}
     - run: conda info
     - run: conda list
     - run: conda config --show

environment.yml

@@ -12,4 +12,5 @@ dependencies:
   - pytest>=3.5
   - flake8
   - pip:
-    - pytest-flake8
+    - pytest-flake8
+    - pydantic==1.5