build: Add caching for pip files (#520)

dgzlopes · web-flow · commit fbfafa4712ae · 2020-03-23T16:02:41.000-07:00
Caches lets Travis CI store directories between builds, which is useful for storing dependencies that take longer to compile or download. -Travis CI Docs

Signed-off-by: Daniel González Lopes danielgonzalezlopes@gmail.com
diff --git a/.travis.yml b/.travis.yml
@@ -2,6 +2,8 @@ dist: xenial
 
 language: python
 
+cache: pip
+
 python:
   - '3.4'
   - '3.5'
