feat: add server timing to responses #477

Job	Run time
js-test-and-release / check	2m 16s
js-test-and-release / test-chrome	55s
js-test-and-release / test-firefox	26s
js-test-and-release / test-node (windows-latest, lts/*)	2m 52s
js-test-and-release / test-chrome-webworker	57s
js-test-and-release / test-node (ubuntu-latest, lts/*)	38s
js-test-and-release / test-electron-main	42s
js-test-and-release / test-node (macos-latest, lts/*)	1m 56s
js-test-and-release / test-electron-renderer	25s
js-test-and-release / test-firefox-webworker	33s
js-test-and-release / test-webkit (ubuntu-latest, lts/*)	2m 14s
js-test-and-release / test-webkit-webworker (ubuntu-latest, lts/*)	1m 4s
js-test-and-release / test-webkit (macos-latest, lts/*)	2m 15s
js-test-and-release / test-webkit-webworker (macos-latest, lts/*)	2m 36s
js-test-and-release / release-check	0s
js-test-and-release / release	0s
	19m 49s

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