Use a separate lint file

.github/workflows/ci.yml → .github/workflows/lint.yml

-name: Continuous integration
+name: Linting
 
 on: 
   pull_request:
@@ -23,6 +23,7 @@ jobs:
         uses: conda-incubator/setup-miniconda@v2.0.1
         with:
           channels: conda-forge,bioconda,defaults
+          channel-priority: strict
           installer-url: https://github.com/conda-forge/miniforge/releases/download/4.11.0-0/Mambaforge-4.11.0-0-Linux-x86_64.sh
         # Conda-incubator uses 'test' environment by default.
       - name: install requirements