use language: javascript for travis

sideshowbarker · sideshowbarker · commit 43517698005a · 2014-10-06T12:30:04.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,3 +1,4 @@
+language: javascript
 env:
   global:
     - CHECKER=http://validator.w3.org/nu/

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,4 @@`
	`1`	`+language: javascript`
`1`	`2`	`env:`
`2`	`3`	`global:`
`3`	`4`	`- CHECKER=http://validator.w3.org/nu/`