Add pylint GH action

.github/workflows/linting.yml

@@ -0,0 +1,20 @@
+name: Linting
+
+on: [push, pull_request]
+
+jobs:
+  pylint:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.7
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.7
+    - name: Install pylint
+      run: |
+        python -m pip install --upgrade pip
+        pip install pylint
+    - name: Run pylint
+      run: |
+        pylint algorithmic_efficiency