force setuptools upgrade, see tox-dev/tox-travis#76

therefromhere · therefromhere · commit cf8443138df3 · 2017-12-11T15:11:47.000+13:00
diff --git a/.travis.yml b/.travis.yml
@@ -24,7 +24,7 @@ deploy:
 env:
 - DJANGO=1.11
 - DJANGO=2.0
-install: pip install -U tox-travis
+install: pip install -U setuptools tox-travis
 language: python
 matrix:
   exclude:
