Change bindings processing to use CSS selectors #2

Job	Run time
Core running from ${{ matrix.directory }}	0s
Gutenberg running from ${{ matrix.directory }}	0s
Core running from src / Core running from src / Linux	2m 9s
Core running from build / Core running from build / Linux	2m 10s
Core running from build / Core running from build / Windows	3m 59s
Core running from src / Core running from src / Windows	4m 2s
Gutenberg running from build / Gutenberg running from build / Linux	8m 49s
Gutenberg running from src / Gutenberg running from src / Linux	8m 49s
Gutenberg running from build / Gutenberg running from build / Windows	12m 24s
Gutenberg running from src / Gutenberg running from src / Windows	12m 21s
Slack Notifications	0s
Failed workflow tasks	0s
	54m 43s

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