Required Python now 3.6 or greater (#231)

Author: satterly

README.md

@@ -2,23 +2,14 @@ Alerta Command-Line Tool
 ========================
 
 [![Actions Status](https://github.com/alerta/python-alerta-client/workflows/CI%20Tests/badge.svg)](https://github.com/alerta/python-alerta-client/actions)
- [![Gitter chat](https://badges.gitter.im/alerta/chat.png)](https://gitter.im/alerta/chat) [![Coverage Status](https://coveralls.io/repos/github/alerta/python-alerta-client/badge.svg?branch=master)](https://coveralls.io/github/alerta/python-alerta-client?branch=master) ![Docker Build and Push](https://github.com/alerta/python-alerta-client/workflows/Docker%20Build%20and%20Push/badge.svg)
+ [![Gitter chat](https://badges.gitter.im/alerta/chat.png)](https://gitter.im/alerta/chat) [![Coverage Status](https://coveralls.io/repos/github/alerta/python-alerta-client/badge.svg?branch=master)](https://coveralls.io/github/alerta/python-alerta-client?branch=master)
 
 Unified command-line tool, terminal GUI and python SDK for the Alerta monitoring system.
 
 ![screen shot](/docs/images/alerta-top-80x25.png?raw=true&v=1)
 
 Related projects can be found on the Alerta Org Repo at <https://github.com/alerta/>.
 
-----
-
-Python 2.7 support is EOL
--------------------------
-
-Starting with Release 6.0 only Python 3.5+ is supported. Release 5.2 was the
-last to support Python 2.7 and feature enhancements for this release ended on
-August 31, 2018. Only critical bug fixes will be backported to Release 5.2.
-
 Installation
 ------------
 

setup.py

@@ -42,11 +42,12 @@ def read(filename):
         'Intended Audience :: System Administrators',
         'Intended Audience :: Telecommunications Industry',
         'License :: OSI Approved :: Apache Software License',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.5',
         'Topic :: System :: Monitoring',
         'Topic :: Software Development :: Libraries :: Python Modules'
     ],
-    python_requires='>=3.5'
+    python_requires='>=3.6'
 )