Merge pull request #8 from arska/renovate/actions-checkout-3.x

chore(deps): update actions/checkout action to v3

Author: arska

.github/workflows/main.yml

@@ -13,7 +13,7 @@ jobs:
         python-version: [3.6, 3.7, 3.8, 3.9, pypy3]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
       with:
@@ -32,7 +32,7 @@ jobs:
     runs-on: "ubuntu-latest"
     needs: [test]
     steps:
-      - uses: "actions/checkout@v2"
+      - uses: "actions/checkout@v3"
       - uses: "actions/setup-python@v4"
         with:
           python-version: "3.8"