Updated mediawiki/extensions
Project: mediawiki/extensions/GraphViz  c968ec19090ab6febcd12ccd5816c5875fddc9df

Add composer support and increment the minor version of this
extension (1.0 -> 1.1.0).

Used PHP_Compatinfo (pci -d) to check required php version.

Change-Id: I71a3d64f71ada66217b627981d45f0b678ce55f2