fix: ttl and caching for ipns urls (#34) #101

Job	Run time
js-test-and-release / check	2m 9s
js-test-and-release / test-node (windows-latest, lts/*)	3m 43s
js-test-and-release / test-node (ubuntu-latest, lts/*)	49s
js-test-and-release / test-node (macos-latest, lts/*)	2m 17s
js-test-and-release / test-chrome-webworker	43s
js-test-and-release / test-chrome	49s
js-test-and-release / test-electron-main	45s
js-test-and-release / test-firefox	38s
js-test-and-release / test-firefox-webworker	47s
js-test-and-release / test-webkit (ubuntu-latest, lts/*)	1m 1s
js-test-and-release / test-webkit-webworker (ubuntu-latest, lts/*)	45s
js-test-and-release / test-webkit (macos-latest, lts/*)	2m 31s
js-test-and-release / test-webkit-webworker (macos-latest, lts/*)	2m 13s
js-test-and-release / test-electron-renderer	22s
js-test-and-release / release-check	2s
js-test-and-release / release	1m 27s
	21m 1s

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