removed python 3.6 from push.yml and setup.py

Author: dleskosky

.github/workflows/push.yml

@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.7, 3.8]
         os: [ubuntu-latest, windows-latest, macos-latest]
 
     steps:

setup.py

@@ -39,7 +39,6 @@ def read(fname):
             "Intended Audience :: Developers",
             "Intended Audience :: Science/Research",
             "License :: OSI Approved :: MIT License",
-            # "Programming Language :: Python :: 3.6",
             "Programming Language :: Python :: 3.7",
             "Programming Language :: Python :: 3.8",
             "Topic :: Scientific/Engineering",