travis improvements

tbolis · tbolis · commit 2c0711af783b · 2018-02-02T13:41:01.000+02:00
fixes #26
diff --git a/.travis.yml b/.travis.yml
@@ -4,6 +4,10 @@ node_js:
   - "8"
   - "7"
   - "6"
+cache:
+  yarn: true
+  directories:
+    - node_modules
 env:
   - CXX=g++-4.8
 addons:
