ci: Add pip cache

hebasto · hebasto · commit b1f7d35addcc · 2020-04-10T03:10:08.000+03:00
diff --git a/.travis.yml b/.travis.yml
@@ -71,7 +71,7 @@ jobs:
     - stage: lint
       name: 'lint'
       env:
-      cache: false
+      cache: pip
       language: python
       python: '3.5' # Oldest supported version according to doc/dependencies.md
       install:
