Fix TravisCI deploy

Author: dolfinus

.travis.yml

@@ -1,7 +1,11 @@
 language: python
 python:
 - '2.7'
+- '3.5'
+- '3.6'
 - '3.7'
+- '3.8'
+cache: pip
 install:
 - pip install flake8
 script:
@@ -18,6 +22,7 @@ deploy:
       distributions: sdist bdist_wheel
       repo: dolfinus/setuptools-git-versioning
     skip_cleanup: 'true'
+    skip_existing: true
   - provider: releases
     api_key:
       secure: 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

setup.py

@@ -24,7 +24,6 @@
         "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",