Added cargo caching

vignesh-sankaran · vignesh-sankaran · commit 209dab0f40bb · 2017-06-14T00:27:17.000+10:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,6 +3,7 @@ sudo: false
 dist: trusty
 
 cache:
+  cargo: true
   directories:
     - $HOME/.yarn-cache
 
