Merge pull request #122 from ev-br/unpin_pytest

CI: add a workflow with pytest == 8

Author: ev-br

.github/workflows/pip.yml

@@ -15,9 +15,9 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ['3.10']
+        python-version: ['3.10', '3.11']
         os:  [ubuntu-latest]
-        pytest: ['"pytest<8.0"']
+        pytest: ['"pytest<8.0"', pytest]
         # pip cache paths
         include:
         - os: ubuntu-latest