switch to pre-commit action

.github/workflows/unit-tests.yml

@@ -7,25 +7,12 @@ env:
   CACHE_NUM: 2
 
 jobs:
-  run-pre-commit:
+  pre-commit:
     runs-on: ubuntu-latest
     steps:
-      - name: Set CACHE_DIR (hard-coded in cache action)
-        run: echo "CACHE_DIR=$(echo ~/.pre_commit_cache)" >> $GITHUB_ENV
-      - uses: actions/checkout@main
-
-      - uses: actions/cache@v2
-        with:
-          path: ~/.pre_commit_cache
-          key: pre-commit|${{ hashFiles('.pre-commit-config.yaml') }}|${{ env.CACHE_NUM  }}
-
-      - name: Install and run pre-commit hooks
-        run: |
-          export PIP_CACHE_DIR="${CACHE_DIR}/pip"
-          export PRE_COMMIT_HOME="${CACHE_DIR}/pre-commit"
-          pip install pre-commit
-          pre-commit install
-          pre-commit run --all
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v3
+    - uses: pre-commit/[email protected]
 
   test:
     runs-on: ubuntu-latest