Remove Python 3.8 from testing (#330)

Equivalent to cucumber/gherkin#325

Author: davidjgoss

.github/workflows/test-python.yml

@@ -43,7 +43,7 @@ jobs:
       matrix:
         os:
           - ubuntu-latest
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
         include:
           - os: windows-latest
             python-version: "3.10"