Update tested and supported Python versions

.travis.yml

@@ -12,12 +12,14 @@ matrix:
   include:
     - python: "2.7"
       env: TOXENV=py27
-    - python: "3.4"
-      env: TOXENV=py34
     - python: "3.5"
       env: TOXENV=py35
     - python: "3.6"
       env: TOXENV=py36
+    - python: "3.7"
+      env: TOXENV=py37
+    - python: "3.8"
+      env: TOXENV=py38
     - python: "3.6"
       env: TOXENV=with-sslib-master
 

appveyor.yml

@@ -1,5 +1,13 @@
 environment:
   matrix:
+    - PYTHON: "C:\\Python38"
+      PYTHON_VERSION: 3.8
+      PYTHON_ARCH: 32
+
+    - PYTHON: "C:\\Python37"
+      PYTHON_VERSION: 3.7
+      PYTHON_ARCH: 32
+
     - PYTHON: "C:\\Python36"
       PYTHON_VERSION: 3.6
       PYTHON_ARCH: 32
@@ -8,10 +16,6 @@ environment:
       PYTHON_VERSION: 3.5
       PYTHON_ARCH: 32
 
-    - PYTHON: "C:\\Python34"
-      PYTHON_VERSION: 3.4
-      PYTHON_ARCH: 32
-
     - PYTHON: "C:\\Python27"
       PYTHON_VERSION: 2.7
       PYTHON_ARCH: 32

setup.py

@@ -103,13 +103,15 @@
     'Programming Language :: Python :: 2',
     'Programming Language :: Python :: 2.7',
     'Programming Language :: Python :: 3',
-    'Programming Language :: Python :: 3.4',
     'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: 3.6',
+    'Programming Language :: Python :: 3.7',
+    'Programming Language :: Python :: 3.8',
     'Programming Language :: Python :: Implementation :: CPython',
     'Topic :: Security',
     'Topic :: Software Development'
   ],
+  python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4",
   install_requires = [
     'iso8601>=0.1.12',
     'requests>=2.19.1',

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py27, py34, py35, py36
+envlist = py27, py35, py36, py37, py38
 skipsdist = true
 
 [testenv]