Travis: use tox-travis

Codeslayer666 · Codeslayer666 · commit 475468124af9 · 2019-08-30T18:12:09.000+03:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,7 +7,7 @@ python:
   - "3.6"
   - "nightly"
 install:
-  - pip install tox tox-pyenv
+  - pip install tox-travis
   - pip install -r requirements.txt
 script:
   - tox
