Remove mz as a production dependency. Instead use pify for promisifying.

[realityking]

mz sticks around as a dev dependency

[pahen]

What's the reason for this change?

[realityking]

Sorry, should've explained that in the first post. mz is not the smallest dependency (it pulls in 4 more dependency) and it's only used in madge to promisify these 4 methods.

[pahen]

Ok, I see :) Why keep mz as a dev dependency and not use pify there too?

[realityking]

That's not as easy as a test uses the exists method ). exists isn't actually part of fs but something that mz implemented.

The test using exists is this one:

madge/test/api.js

Lines 263 to 264 in 7fce4b7

	return fs
	.exists(imagePath)

[pahen]

Ok, I see. Then I have no problem with merging this :)