Changed the version of thorax-inspector

Version 0.2.4 on thorax-inspector need livereload which no longer in the npm registry.
So I prefixed it with tilde to take the latest version.

From the npm error log:
1724 error 404 'livereload' is not in the npm registry.
1724 error 404 You should bug the author to publish it
1724 error 404 It was specified as a dependency of 'thorax-inspector'