Sync to multiple destination directories

[stephan-gh]

Could you add an option to sync a folder to multiple destination directories? Currently I can just run syncy twice, but it would be nice if they could be specified as array:

// Current
syncy(['src/**', '!src/folder/**'], 'dest1')
syncy(['src/**', '!src/folder/**'], 'dest2')

// Directly with multiple destination directories
syncy(['src/**', '!src/folder/**'], ['dest1', 'dest2'])

[mrmlnc]

Yeap, this is possible, and I see two ways:

1. Once read the source directory and compare it with the destination directories.
2. Just give the ability to specify multiple destination directories and run Syncy many times.

In the first case we can save 200-300ms on each iteration (destination directory) (figure taken from https://github.com/mrmlnc/syncy#tests).

Well, now i have no free time for this case, but I can start work on it at the end of the week.

[mrmlnc]

Resolved by syncy@2.2.0.