Don't use `this` to refer to variables on export
Don't use `this` to refer to variables on export

The common-shakeify plugin is optimizing `exports.isCapitalized` out of the
bundle becuase it's only ever used internally and refered to via `this`.

This is fixed pending browserify/common-shakeify#14, but this also solves
the problem quicker :)

Tessmore/sbd,Tessmore/sbd