Test snakemake on required 3.11

Author: rhpvorderman

.github/workflows/ci.yml

@@ -64,7 +64,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8"]
+        python-version: ["3.11"]
         test-program: [snakemake, miniwdl]
     steps:
       - uses: actions/checkout@v2.3.4