Update pylint.yml

Author: notactuallyfinn

.github/workflows/pylint.yml

@@ -18,6 +18,8 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install pylint
+        pip install .
+        pip install .[dev]
     - name: Analysing the code with pylint
       run: |
         pylint $(git ls-files 'src/*.py')