Update VE core submodule to master (cdd2691)

New changes:
6ae94bc Add tests for ve.instanceOfAny()
ea1ac17 Localisation updates from https://translatewiki.net.
a9a25cb Update OOjs UI to v0.1.0-pre (f1abca8e82)
ab55974 build: Update various devDependencies to latest
921d16a Localisation updates from https://translatewiki.net.
cdd2691 Use history as as global

Change-Id: I4ff70005591cac11c39e08a602457cf4e0eda9be