Update documentation, setup.py, and CI build for 3.7+ requirement

Author: oschwald

.travis.yml

@@ -1,21 +1,14 @@
 language: python
 matrix:
   include:
-    - python: 2.7
-      dist: trusty
-      env: RUN_SNYK=1
-    - python: 3.5
-      dist: trusty
-    - python: 3.6
-      dist: trusty
     - python: 3.7
       dist: xenial
     - python: 3.8
       dist: xenial
       env: RUN_LINTER=1
     - python: nightly
       dist: xenial
-    - python: pypy
+    - python: pypy3
       dist: trusty
   allow_failures:
     - python: nightly

HISTORY.rst

@@ -3,6 +3,11 @@
 History
 -------
 
+2.0.0
+++++++++++++++++++
+
+* IMPORTANT: Python 3.7 or greater is required.
+
 1.5.4 (2020-05-05)
 ++++++++++++++++++
 

README.rst

@@ -93,12 +93,9 @@ invalid IP address or an IPv6 address in an IPv4 database.
 Requirements
 ------------
 
-This code requires Python 2.7+ or 3.5+. Older versions are not supported. The C
+This code requires Python 3.7+. Older versions are not supported. The C
 extension requires CPython. The pure Python implementation has been tested with
-PyPy.
-
-On Python 2, the `ipaddress module <https://pypi.python.org/pypi/ipaddress>`_ is
-required.
+PyPy3.
 
 Versioning
 ----------

setup.py

@@ -133,8 +133,6 @@ def run_setup(with_cext):
             "Intended Audience :: System Administrators",
             "License :: OSI Approved :: Apache Software License",
             "Programming Language :: Python :: 3",
-            "Programming Language :: Python :: 3.5",
-            "Programming Language :: Python :: 3.6",
             "Programming Language :: Python :: 3.7",
             "Programming Language :: Python :: 3.8",
             "Programming Language :: Python",