Update release script for sourcmap syntax change
(cherry picked from commit d79c036ad6cbf0da3593da98410f17bb6b272639)
Fix #14282. Don't fondle getPreventDefault if preventDefault exists. Close gh-1365.
(cherry picked from commit 4671ef15c2d62962048fd4863911146fcc085f26)

Conflicts:
	src/event.js