Install dependencies before PyLint

.github/workflows/tests.yml

@@ -78,6 +78,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install pylint
+          pip install -r requirements.txt
       - name: Analysing the code with pylint
         run: |
           pylint rare --disable=R,C,E0611,I1101,W1203,W1201,W0201 --ignore=ui,singleton.py,json_formatter.py --extension-pkg-whitelist=PyQt5