Try fixing cache

Author: shulcsm

.github/workflows/ci.yml

@@ -36,19 +36,25 @@ jobs:
         - '3.8'
         - '3.9'
         - '3.10'
+
+    defaults:
+      run:
+        shell: bash        
     steps:
     - uses: actions/checkout@v2
 
     - uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
 
+    - name: Get full Python version
+      id: full-python-version
+      run: echo ::set-output name=version::$(python -c "import sys; print('-'.join(str(v) for v in sys.version_info))")
+
     - uses: actions/cache@v2
       with:
         path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ hashFiles('**/poetry.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-pip-
+        key: ${{ runner.os }}-${{ steps.full-python-version.outputs.version }}-${{ hashFiles('**/poetry.lock') }}
 
     - name: Upgrade packaging tools
       run: python -m pip install --upgrade pip setuptools virtualenv wheel