Updated mediawiki/extensions
Project: mediawiki/extensions/Scribunto  dfb6455c2c2afd7681bbcd245c01629fe9528757
null
Fix string extending

Built-in modules (e.g. the upcoming ustring) should be able to extend
the string metatable, but user modules (and the debug console) should
not be able to.

But currently built-in modules cannot extend the string metatable in
LuaStandalone, while in LuaSandbox the string metatable can be extended
in the console. Fix this and add unit tests.

Change-Id: I15f5598fed318f2fe26b08ec47e16053dddc13c4