Drop Python 3.7 (#672)

Author: Dreamsorcerer

.github/workflows/ci.yaml

@@ -49,7 +49,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        pyver: ['3.7', '3.8', '3.9', '3.10', 'pypy-3.8']
+        pyver: ['pypy-3.8', '3.8', '3.9', '3.10', '3.11']
     timeout-minutes: 15
     steps:
     - name: Checkout

setup.py

@@ -31,7 +31,6 @@ def read(f):
           'Intended Audience :: Developers',
           'Programming Language :: Python',
           'Programming Language :: Python :: 3',
-          'Programming Language :: Python :: 3.7',
           "Programming Language :: Python :: 3.8",
           "Programming Language :: Python :: 3.9",
           "Programming Language :: Python :: 3.10",