Adding tests, fixing undefined deps issue and fixes inject hard lazy bundle map issue

[tufandevrim]

This PR

• adds test
• fixes undefined deps issue (related to PR if _options.basedir exists, use it in external, exclude and ignore browserify/browserify#1551)
• fixes inject hard lazy bundle map issue

@juandopazo

[irae]

Don't need to change, but let's discuss bumping per commit versus bumping per NPM push. I would say bumping per push is preferable for a number of reasons.

[irae]

Please, change the setTimeout before merging this PR. The other comments are just ideas for improvements for other PRs. The setTimeout can really break the tests depending on where you run the tests and give false negatives.

[juandopazo]

I don't have any feedback other than what Irae commented.

[tufandevrim]

Removing setTimeout will require refactoring on how we bundle the lazy bundles. So I will create a separate PR for only this purpose which will stream the src if no outfile specified in extractify config just like how browserify does.