Bump version to 1.8.1 with Python 3.7 requires

This update bumps the `python_requires` to be `>=3.7` as the sdist build
requires PEP 517 support that is somewhat only guaranteed with the pip
that was shipped with Python 3.7 or greater. Since 3.6 has been end of
life since December 2021 and the remaining Linux distributions that
still use it have system provided packages this shouldn't be a surprise.

Signed-off-by: Jordan Borean <jborean93@gmail.com>

.github/workflows/ci.yml

@@ -57,8 +57,6 @@ jobs:
           version: cp38-macosx_arm64
         - os: macOS-12
           version: cp37-macosx_x86_64
-        - os: macOS-12
-          version: cp36-macosx_x86_64
 
         - os: windows-2022
           version: cp310-win_amd64
@@ -76,10 +74,6 @@ jobs:
           version: cp37-win_amd64
         - os: windows-2022
           version: cp37-win32
-        - os: windows-2022
-          version: cp36-win_amd64
-        - os: windows-2022
-          version: cp36-win32
 
     steps:
     - name: Set up environment
@@ -181,7 +175,6 @@ jobs:
         - win-py-3.9
         - win-py-3.8
         - win-py-3.7
-        - win-py-3.6
         arch:
         - x64
         - x86
@@ -194,8 +187,6 @@ jobs:
           pyenv: '3.8'
         - name: win-py-3.7
           pyenv: '3.7'
-        - name: win-py-3.6
-          pyenv: '3.6'
 
     steps:
     - name: Check out code

README.txt

@@ -36,14 +36,15 @@ Basic
 
 * a C compiler (such as GCC)
 
-* Python 3.6+ (older releases support older versions, but are unsupported)
+* Python 3.7+ (older releases support older versions, but are unsupported)
 
 * the `decorator` python package
 
 Compiling from Scratch
 ----------------------
 
-To compile from scratch, you will need Cython >= 0.21.1.
+To compile from scratch, you will need Cython >= 0.29.29 which is automatically
+installed by pip in an isolated build virtual environment.
 
 For Running the Tests
 ---------------------

setup.py

@@ -274,7 +274,7 @@ def gssapi_modules(lst):
 
 setup(
     name='gssapi',
-    version='1.8.0',
+    version='1.8.1',
     author='The Python GSSAPI Team',
     author_email='jborean93@gmail.com',
     packages=['gssapi', 'gssapi.raw', 'gssapi.raw._enum_extensions',
@@ -287,7 +287,7 @@ def gssapi_modules(lst):
     long_description=long_desc,
     license='LICENSE.txt',
     url="https://github.com/pythongssapi/python-gssapi",
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Programming Language :: Python',