Build: Use double quotes in .travis.yml

mgol · mgol · commit 06320c88af5b · 2015-09-11T21:35:22.000+02:00
.travis.yml used single quotes which is inconsistent with what we use in most
other files. Also, the file was missing an empty line at the end.
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,7 @@
 language: node_js
 sudo: false
 node_js:
-- '0.10'
-- '0.12'
-- '4'
+- "0.10"
+- "0.12"
+- "4"
+
