lint cache dependencies, refactored

.github/workflows/lint.yml

@@ -1,40 +1,27 @@
 name: Lint
-
 on:
   push:
     branches:
       - master
   pull_request:
     branches:
       - '**'
-
 jobs:
   lint:
-    name: Python ${{ matrix.python-version }} - ${{ matrix.os }} - ${{ github.event_name }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version:
-          - 3.8
-        os:
-          - ubuntu-latest
-
+    name: Python linting
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Set up Python ${{ matrix.python-version }}
+      - name: Set up Python 3.8
         uses: actions/setup-python@v2
         with:
-          python-version: ${{ matrix.python-version }}
-      - name: Cache pip dependencies
-        uses: actions/cache@v2
+          python-version: 3.8
+      - uses: actions/cache@v2
         with:
-          path: ~/.cache/pip # This path is specific to Ubuntu
-          # Look to see if there is a cache hit for the corresponding requirements file
+          path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('hub/requirements/*.txt') }}
           restore-keys: |
             ${{ runner.os }}-pip-
-            ${{ runner.os }}-
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip