Fix type of module.require
Fix type of module.require

Although it has the same type as the global require function, the global
require function isn't a type (constructor).  So update the type of
module.require to match it.  This fixes the following warning:

./core.js:76: WARNING - Bad type annotation. Unknown type require
 * @type {require}
          ^

Signed-off-by: Kevin Locke <ffb4761cba839470133bee36aeb139f58d7dbaa9@kevinlocke.name>

dcodeIO/node.js-closure-compiler-externs,keunwoo/node.js-closure-compiler-externs