Drop official support for EOL python3.6

Author: Jon Wedell

.github/workflows/continous_integration.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: [ "3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12" ]
+        python-version: [ "3.7", "3.8", "3.9", "3.10", "3.11", "3.12" ]
     steps:
       - uses: actions/checkout@v4
       - name: Setup python version ${{ matrix.python-version }}

docs/release-notes.rst

@@ -13,6 +13,8 @@ Other changes:
 
 - Updates to the package metadata to tell PyPI that Python versions through 3.12 are supported.
 - Minor updates to the documentation.
+- Ended official support for end-of-life Python 3.6 and stopped building wheels for it. You should
+  still be able to install on 3.6 if you are able to build cnmrstar from source. Alternatively, use version 3.3.2.
 
 3.3.2
 ~~~~~

setup.py

@@ -29,7 +29,7 @@ def get_version():
       packages=['pynmrstar'],
       ext_modules=[cnmrstar],
       install_requires=['requests>=2.21.0,<=3'],
-      python_requires='>=3.6',
+      python_requires='>=3.7',
       author='Jon Wedell',
       author_email='[email protected]',
       description='PyNMR-STAR provides tools for reading, writing, modifying, and interacting with NMR-STAR files. '
@@ -46,7 +46,6 @@ def get_version():
           'Development Status :: 6 - Mature',
           'Environment :: Console',
           'Programming Language :: Python :: 3 :: Only',
-          'Programming Language :: Python :: 3.6',
           'Programming Language :: Python :: 3.7',
           'Programming Language :: Python :: 3.8',
           'Programming Language :: Python :: 3.9',