allow install on python 3.6 systems even though it is not supported

CHANGELOG

@@ -3,6 +3,7 @@ jc changelog
 20220510 v1.19.0 (in progress)
 - Add git log command streaming parser
 - Add top -b command parser tested on linux
+- Add top -b command streaming parser tested on linux
 - Fix asciitable-m parser to skip rows that contain column separator
   characters in cell data. A warning message will be printed to STDOUT
   unless `-q` or `quiet=True` is used.

setup.py

@@ -17,7 +17,7 @@ setuptools.setup(
     license='MIT',
     long_description=long_description,
     long_description_content_type='text/markdown',
-    python_requires='>=3.7',
+    python_requires='>=3.6',
     url='https://github.com/kellyjonbrazil/jc',
     packages=setuptools.find_packages(exclude=['*.tests', '*.tests.*', 'tests.*', 'tests']),
     entry_points={