Drop support for Python 3.7

Author: astrofrog

.github/workflows/ci_workflows.yml

@@ -20,20 +20,20 @@ jobs:
         - linux: codestyle
 
         # Standard tests
-        - linux: py37-test
         - linux: py38-test
         - linux: py39-test
         - linux: py310-test
+        - linux: py311-test
 
-        - macos: py37-test
         - macos: py38-test
         - macos: py39-test
         - macos: py310-test
+        - macos: py311-test
 
-        - windows: py37-test
         - windows: py38-test
         - windows: py39-test
         - windows: py310-test
+        - windows: py311-test
 
   publish:
     uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish_pure_python.yml@v1

setup.cfg

@@ -10,7 +10,7 @@ long_description = file: README.rst
 
 [options]
 zip_safe = False
-python_requires = >=3.7
+python_requires = >=3.8
 packages = find:
 setup_requires = setuptools_scm
 install_requires =

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py{36,37,38,39,py310}-test
+envlist = py{38,39,310,311}-test
 requires = pip >= 18.0
            setuptools >= 30.3.0