Only supports moving one file per package

[ryanboswell]

It doesn't look like the plugin supports moving more than one drop in file per package, it's probably a relatively rare case, but WordPress plugins like https://github.com/stuttter/ludicrousdb have "drop ins" that go to multiple places. When we ran it though, only one file was moved and the others were left untouched.

I'm pretty sure that I've narrowed it down to a few lines in the getPaths method, where the files value is overwritten, which causes problems for multiple dropin files going to the same place from the same source, only the last one in the list is actually moved.

[onnimonni]

Cool! Can you submit a PR?