Update ci.yml

Author: AndreRico

.github/workflows/ci.yml

@@ -17,7 +17,8 @@ jobs:
       R_LIBS_USER: ./r-libs
 
     steps:
-      - uses: actions/checkout@v1
+      # - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
         with:
           fetch-depth: 1
 
@@ -39,11 +40,14 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: 3.7
+          # python-version: 3.7
+          python-version: '3.9'
 
       - name: Install Poetry
-        uses: snok/[email protected]
+        # uses: snok/[email protected]
+        uses: snok/[email protected]
         with:
+          version: 1.2.2
           virtualenvs-create: true
           virtualenvs-in-project: true