Toetag dependency issue

I am getting the following error when using this library, and am absolutely stumped.

Module not found: Error: Can't resolve './lib/bootstrap-variables' in '/path/to/node_modules/toetag'

When looking into the toetag library it looks like it is referencing a file not in its source code. I am posting this here instead of that repo because it looks like you all made that library anyways, and there is way more activity here.

[chadly]

Did you override your resolve.extensions? Webpack 2 is set to load json files by default extensionless. But if you override resolve.extensions, you will need to make sure to include .json in there.

[frankolson]

Alright so I looked into it more and it looks like webpack has json loadin on by default. This was confirmed because when I updated toetag from this:

module.exports = {
  'bootstrap': require('./lib/bootstrap-variables')
} 

to this:

module.exports = {
  'bootstrap': require('./lib/bootstrap-variables.json')
}

(note the extension change) it started working. Is there a reason why the extension was left out?