feat: add server timing to responses #476

Job	Run time
js-test-and-release / check	2m 24s
js-test-and-release / test-node (windows-latest, lts/*)	3m 38s
js-test-and-release / test-firefox	47s
js-test-and-release / test-node (ubuntu-latest, lts/*)	39s
js-test-and-release / test-chrome	57s
js-test-and-release / test-node (macos-latest, lts/*)	2m 14s
js-test-and-release / test-chrome-webworker	1m 5s
js-test-and-release / test-electron-main	48s
js-test-and-release / test-electron-renderer	34s
js-test-and-release / test-firefox-webworker	54s
js-test-and-release / test-webkit (ubuntu-latest, lts/*)	1m 11s
js-test-and-release / test-webkit (macos-latest, lts/*)	2m 39s
js-test-and-release / test-webkit-webworker (ubuntu-latest, lts/*)	54s
js-test-and-release / test-webkit-webworker (macos-latest, lts/*)	2m 8s
js-test-and-release / release-check	0s
js-test-and-release / release	0s
	20m 52s

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