Update dependencies and devDependencies

* I changed expected output of the test to support the latest version of [source-map](https://github.com/mozilla/source-map).
* I updated dependencies and devDependencies of this project.
* I fixed JSHint setting. Now there is no need to set the "ES5" option expressly. (cf. http://www.jshint.com/blog/2013-05-07/2-0-0/)