Ref #13483: Cherry-pick tests from master ea5c22ec12e6a548b1ec2d7b0dcd9f71bea8d5dd
Fix #13855: line-height animations. Close gh-1265.
(cherry picked from commit 3971c2ebb2e6729fe80bac4ee7b91bc02f26486f)
Fix #13835: classes separated by form feed
(cherry picked from commit d8a35011ec05ed3493a85c1bd699902893cd437c)
Fix #13894: CSS identifiers with backslash-escaped whitespace
build: correct paths so that archiving works.
(cherry picked from commit 8ab32fe3ff81491e01f2da132ec2ba9bd499b555)
build: update release script to use nodejs archiver.
(cherry picked from commit eaee6eae0fee57337fabe41eb4558cf1acdf765b)

Conflicts:
	AUTHORS.txt
build: switch from .min.gz to .zip format.
(cherry picked from commit 5e8a5f4adcbaf07a8306f8a6a14a9fbcda81afb8)
Update the map reference in each minified file.