update travis

Author: KaptenJansson

package.json

@@ -25,6 +25,6 @@
     "grunt-jscs": "^2.0.0",
     "tape": "^4.0.0",
     "testling": "^1.7.1",
-    "travis-multirunner": "^2.6.0"
+    "travis-multirunner": "^2.7.2"
   }
 }