upgrade to nodejs v7.8

eistrati · eistrati · commit 72f73c42086a · 2017-03-30T17:30:32.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,7 +3,7 @@ sudo: required
 node_js:
   - '4.3'
   - '6.10'
-  - '7.7'
+  - '7.8'
 cache:
   edge: true
   directories:
