adding pylint and mypy to pipeline

.github/workflows/lint-workflow.yml

@@ -17,7 +17,15 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        pip install pylint
         pip install pylama
+        mypy
+    - name: Analysing the code with pylama
+      run: |
+        pylama --skip='tests/*'
     - name: Analysing the code with pylint
       run: |
-        pylama --skip='tests/*'
+        pylint modifiable_items_dictionary/
+    - name: Analysing the code with mypy
+      run: |
+        mypy modifiable_items_dictionary/