[TASK] Update RequireJS to 2.1.15

Resolves: #61608
Releases: master
Change-Id: Ic3ba3542bea23d852327d77821610f19844ee1e3
Reviewed-on: http://review.typo3.org/32781
Reviewed-by: Felix Kopp <felix-source@phorax.com>
Reviewed-by: Benjamin Mack <benni@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>