add cache to travis

2019-07-11 20:49:39 -04:00 · 2019-07-11 20:49:39 -04:00 · 4e7f2e7e10
commit 4e7f2e7e10
--- a/.travis.yml
+++ b/.travis.yml
@ -1,5 +1,9 @@
 dist: xenial
 language: python
+cache:
+  pip: true
+  directories:
+  - "$HOME/.cache/pypoetry"
 python:
  - "2.7"
  - "3.4"