Fixed test command for travis

Gruntfile.js

@@ -67,6 +67,4 @@ module.exports = function (grunt) {
 
     // Default task(s).
     grunt.registerTask('default', []);
-
-
 };

package.json

@@ -33,7 +33,7 @@
   ],
   "main": "./dist/showdown.js",
   "scripts": {
-    "test": "mocha ./test/run.js"
+    "test": "mocha ./test/**/*.js"
   },
   "devDependencies": {
     "angular": "^1.3.2",