Fix issues with TravisCI config

Author: tleonhardt

.travis.yml

@@ -4,9 +4,6 @@ sudo: false  # false enables container-based build for fast boot times on Linux
 
 matrix:
     include:
-        - os: linux
-          python: 3.4
-          env: TOXENV=py34
         - os: linux
           python: 3.5
           env: TOXENV=py35
@@ -22,9 +19,9 @@ matrix:
           dist: xenial
           env: TOXENV=py38
         - os: linux
-            python: 3.9-dev
-            dist: xenial
-            env: TOXENV=py39
+          python: 3.9-dev
+          dist: xenial
+          env: TOXENV=py39
 #        # Warning: Don't try to use code coverage analysis with pypy as it is insanely slow
 #        - os: linux
 #          python: pypy3