Updated mediawiki/extensions
Project: mediawiki/extensions/EditSubpages  3d4c9159f2669e47523fd5c8031397140c77c330

Version 3.4 containing some minor fixes and changes

- Fix fatal error in certain page/flag combinations.
- Expand functionality of the wildcard flag (+w) to include character classes and negated character classes.

Change-Id: Ib2075d48bb44a1eb2ae0e96997d3c5f2be0d64b4