Update the Python versions tested

3.4 has reached EOL, and 3.8 has been released.

Author: pgjones

Diff for: .travis.yml

@@ -3,15 +3,14 @@ matrix:
   include:
     - python: 2.7
       dist: trusty
-    - python: 3.4
-      dist: trusty
     - python: 3.5
       dist: trusty
     - python: 3.6
       dist: trusty
     - python: 3.7
       dist: xenial
-      sudo: true
+    - python: 3.8
+      dist: xenial
 install:
   - pip install tox-travis
 script: