tests: enable github cache

.github/workflows/ci.yaml

@@ -9,10 +9,12 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-python@v2
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v4
       with:
         python-version: 3.9
+        cache: pip
+        cache-dependency-path: requirements-dev.txt
     - name: Install dependencies
       run: |
         python -m pip install --disable-pip-version-check -r requirements-dev.txt
@@ -24,8 +26,8 @@ jobs:
   autoformat:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-python@v2
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v4
       with:
         python-version: 3.9
     - name: Install dependencies
@@ -41,15 +43,26 @@ jobs:
       matrix:
         python-version: ["3.8", "3.10"]
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
+        cache: pip
+        cache-dependency-path: requirements-dev.txt
     - name: Install dependencies
       run: |
         python -m pip install --disable-pip-version-check -r requirements-dev.txt
         python -m pip install --disable-pip-version-check .
+    - name: Get current date
+      id: date
+      run: echo "::set-output name=curmonth::$(date +'%Y-%m')"
+    - name: Cache Model Files
+      id: cache-model-files
+      uses: actions/cache@v3
+      with:
+        path: ~/.cache
+        key: ${{ steps.date.outputs.curmonth }}
     - name: Test with pytest
       timeout-minutes: 10
       run: |