Python 3.7 and 3.8 are no longer supported by anyio

Author: smurfix

.github/workflows/tests.yaml

@@ -20,8 +20,6 @@ jobs:
           - {python: '3.11'}
           - {python: '3.10'}
           - {python: '3.9'}
-          - {python: '3.8'}
-          - {python: '3.7'}
           - {name: PyPy, python: 'pypy-3.10', tox: pypy310}
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2