CI: Drop Python 3.6 support

Author: effigies

.github/workflows/stable.yml

@@ -26,7 +26,7 @@ jobs:
     strategy:
       matrix:
         os: ['ubuntu-latest', 'macos-latest']
-        python-version: [3.6, 3.7, 3.8, 3.9, "3.10"]
+        python-version: [3.7, 3.8, 3.9, "3.10"]
         install: ['pip']
         check: ['ci_tests']
         pip-flags: ['']

setup.cfg

@@ -20,7 +20,7 @@ classifiers =
     Topic :: Scientific/Engineering
 
 [options]
-python_requires = >=3.6
+python_requires = >=3.7
 install_requires =
     numpy
     scipy