Hello jammy, goodbye bionic

Also, time to ditch py3.5 (no longer in the runners list), and 3.6
(below the default available). And time to add 3.11 (now available)

Author: waveform80

.github/workflows/test.yml

@@ -14,24 +14,21 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: ubuntu-18.04
-            python: "3.5"
-            experimental: false
-          - os: ubuntu-18.04
-            python: "3.6"
-            experimental: false
-          - os: ubuntu-18.04
+          - os: ubuntu-20.04
             python: "3.7"
             experimental: false
           - os: ubuntu-20.04
             python: "3.8"
             experimental: false
           - os: ubuntu-20.04
             python: "3.9"
-            experimental: true
-          - os: ubuntu-20.04
+            experimental: false
+          - os: ubuntu-22.04
             python: "3.10"
-            experimental: true
+            experimental: false
+          - os: ubuntu-22.04
+            python: "3.11"
+            experimental: false
 
     runs-on: ${{ matrix.os }}
     continue-on-error: ${{ matrix.experimental }}