Why would you store a minified version in the VCS, especially not having it in sync with the original source code? Shouldn't it be an artefact kept out of the VCS and built automatically by, for example, make and UglifyJS?
It's more convenient with a minified source layoung around somewhere. Also it's quite small:
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By putting the source on github you're inviting people to use your code in their projects, and pick it apart. It's next to impossible to pick apart like this. In addition, a minified version is a build product, which you don't put in a VCS.
Offer the minified version as a download, that's what that feature is there for.
