fix: ensure DHT routing tables are not empty (#150) #166

Job	Run time
js-test-and-release / check	1m 13s
js-test-and-release / test-node (windows-latest, lts/*)	1m 58s
js-test-and-release / test-chrome	15s
js-test-and-release / test-chrome-webworker	23s
js-test-and-release / test-node (ubuntu-latest, lts/*)	18s
js-test-and-release / test-firefox	22s
js-test-and-release / test-node (macos-latest, lts/*)	1m 35s
js-test-and-release / test-firefox-webworker	16s
js-test-and-release / test-webkit-webworker (ubuntu-latest, lts/*)	1m 1s
js-test-and-release / test-electron-main	19s
js-test-and-release / test-webkit-webworker (macos-latest, lts/*)	1m 36s
js-test-and-release / test-webkit (ubuntu-latest, lts/*)	1m 3s
js-test-and-release / test-webkit (macos-latest, lts/*)	1m 44s
js-test-and-release / test-electron-renderer	23s
js-test-and-release / release-check	2s
js-test-and-release / release	47s
	13m 15s

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