Add Python 3.11, drop Python 3.7 (#383)

AWS Lambda is phasing out Python 3.7, too, so let't do it.

.github/workflows/ci.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: "${{ matrix.os }}"
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "pypy-3.7"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "pypy-3.9"]
         os: ["ubuntu-latest", "macos-latest", "windows-latest"]
     steps:
       - uses: "actions/checkout@v3"

setup.cfg

@@ -25,10 +25,10 @@ classifiers =
     Operating System :: POSIX
     Natural Language :: English
     Programming Language :: Python
-    Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
     Programming Language :: Python :: 3 :: Only
     Topic :: Documentation
     Topic :: Utilities
@@ -38,7 +38,7 @@ classifiers =
     Topic :: Text Processing :: Markup :: XML
 
 [options]
-python_requires = >=3.7
+python_requires = >=3.8
 install_requires =
     reportlab
     lxml

tox.ini

@@ -1,9 +1,9 @@
 [tox]
 envlist =
+    py311
     py310
     py39
     py38
-    py37
     flake8
 
 [testenv]
@@ -13,14 +13,14 @@ commands =
     python -m pytest {posargs}
 
 [testenv:flake8]
-basepython = python3.7
+basepython = python3.8
 deps = flake8
 commands =
     flake8 . --count --show-source --statistics
 
 [gh-actions]
 python =
-    3.7: py37
     3.8: py38
     3.9: py39
     3.10: py310
+    3.11: py311