Update test.yml

Author: jackton1

.github/workflows/test.yml

@@ -19,16 +19,16 @@ jobs:
         python-version: [3.6, 3.7, 3.8, 3.9, '3.10.0-beta.1']
 
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2
         with:
           submodules: migration_fixer/tests/demo
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2.2.2
+        uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
 
-      - uses: actions/cache@v2.1.6
+      - uses: actions/cache@v2
         id: pip-cache
         with:
           path: ~/.cache/pip