Don't test in python < 3.11 any longer

.github/workflows/test.yaml

@@ -42,7 +42,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.11', '3.12']
     steps:
     - name: Checkout the project
       uses: actions/checkout@v4

README.adoc

@@ -96,8 +96,8 @@ shipped as a single file.
 To reduce the amount of code added to the it, the script will only contain a
 parser made for that specific help text. For that reason there is no need for
 the generator itself to be written in bash, instead that part is written in
-Python 3. Though, this also means that you have to regenerate your parser every
-time you change the help text (see link:#on-the-fly-parser-generation[On-the-fly
+Python 3.11. Though, this also means that you have to regenerate your parser
+every time you change the help text (see link:#on-the-fly-parser-generation[On-the-fly
 parser generation] for automating that part while developing).
 
 ==== Local vs. global variables