Errors swallowed in watch mode

[paulcpederson]

Say you have a JavaScript file named gloob.js with an invalid syntax like:

var gloob = hello())

If you run simplifyify gloob.js it correctly reports the error and exits.

If, however, you run simplifyify gloob.js -w. When you save the file and introduce this error, it simply reports that the file is changed. The error is not reported. The output bundle file will be blank, but nothing indicates that there was an error.

I did a bit of poking around and it seems that the error event is not firing in bin/simplifyify.js or in lib/index.js. Perhaps it is being swallowed in write-bundles.js?

I could try writing a failing test for this and submitting a pr if that would help. I'm not super experienced with chai, but I could probably figure it out.

Oh, and also simplifyify is pretty awesome. 👍