Change supported Python versions in github actions (#416)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0237da2cd26ae3e12e35fdc6e8f3036ffa537a0a..2009bf84737ab31362a1c9cb77d2b83904354a62 100644 (file)
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,17 +13,16 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [2.7, 3.6, 3.7, 3.8]
+        python-version: [2.7, 3.7, 3.9]
         os: [ubuntu-latest]
 
     steps:
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Test
       run: |
         python test/all_tests.py
-