Merge pull request #100 from FledgeXu/ci

Add Python 3.11 to CI.

Author: rgaudin

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       max-parallel: 3
       matrix:
-        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11"]
     steps:
       - name: install ffmpeg and gifsicle
         run: sudo apt update && sudo apt install ffmpeg gifsicle