Fix for Perl memory leak (Mac only)

This is a fix for macOS, where over time perl would start using up a significant portion of your device's memory in some cases. Perl is used to detect media on your device, see this repository: https://github.com/ungive/mediaremote-adapter. This fix updates the mentioned library from version 0.4.2 to version 0.7.0.

Other operating systems are not affected.