Use 3.12 for formatting check (#3049)

* Use 3.12 for formatting check

* Always install `exceptiongroups`

* Install `exceptiongroup` always but not in tests

* Use single quotes in compiled requirements

Author: A5rocks

.github/workflows/ci.yml

@@ -92,7 +92,7 @@ jobs:
         no_test_requirements: ['0']
         extra_name: ['']
         include:
-          - python: '3.8'
+          - python: '3.12'
             check_formatting: '1'
             extra_name: ', check formatting'
           # separate test run that doesn't install test-requirements.txt

ci.sh

@@ -44,7 +44,7 @@ python -m build
 python -m pip install dist/*.whl
 
 if [ "$CHECK_FORMATTING" = "1" ]; then
-    python -m pip install -r test-requirements.txt
+    python -m pip install -r test-requirements.txt exceptiongroup
     echo "::endgroup::"
     source check.sh
 else