Add main and dev categories

Author: maresb

.github/workflows/ci.yml

@@ -44,6 +44,9 @@ jobs:
           environment-file: conda/conda-lock.yml
           environment-name: causalpy-test-${{ matrix.python-version }}
           cache-environment: true
+          create-args: >-
+            --category "main"
+            --category "dev"
       - name: Run doctests
         run: |
           pip install -e .[test]