chore(travis-python3): use only modern pythons on CI

Author: Paul Senechko

.travis.yml

@@ -1,14 +1,13 @@
-dist: xenial
+dist: bionic
 language: python
 python:
-- '2.7'
-- '3.5'
 - '3.6'
 - '3.7'
-- 'pypy'
-- 'pypy3.5'
+- '3.8'
+- '3.9'
+- 'pypy3'
 before_install:
-  - pip install "pip==18.0.0"
+  - pip install "pip==21.1.1"
   - pip install pipenv
 install:
   - pipenv install --dev

README.md

@@ -6,14 +6,13 @@
 
 This is the python wrapper for the Lob.com API. See full Lob.com documentation [here](https://lob.com/docs/python). For best results, be sure that you're using [the latest version](https://lob.com/docs/python#version) of the Lob API and the latest version of the python wrapper.
 
-This library supports active Python releases (i.e., versions which have not reached their end of life), as well as PyPy and PyPy 3.
+This library supports active Python releases (i.e., versions which have not reached their end of life), as well as PyPy 3.
 The currently supported versions include:
 
-* Python 2.7
-* Python 3.5
 * Python 3.6
 * Python 3.7
-* PyPy
+* Python 3.8
+* Python 3.9
 * PyPy 3
 
 ## Table of Contents