Unwrap the `text-decoration` CSS shorthand #2379

Job	Run time
check-makefile (8.3)	19s
check-file-patterns	5s
check-sri-macros-concat	7s
composer-dependency-analyser (8.3)	13s
info (8.3)	11s
lint-latte (8.3)	14s
composer-validate (8.3)	6s
lint-neon (8.3)	12s
lint-php (8.3)	13s
phpcs (8.3)	15s
lint-xml	10s
phpstan (8.3)	25s
phpstan-vendor (8.3)	1m 4s
psalm (8.3)	17s
tester (8.3)	20s
	4m 11s

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