fix: establish RTT at start of connection #129

Job	Run time
check	57s
test-electron-renderer	14s
test-chrome-webworker	36s
test-electron-main	23s
test-chrome	30s
test-firefox	6m 25s
test-firefox-webworker	1m 48s
test-node (windows-latest, lts/*)	20s
test-webkit (ubuntu-latest, lts/*)	16s
test-node (ubuntu-latest, lts/*)	16s
test-webkit (macos-latest, lts/*)	1m 9s
test-node (macos-latest, lts/*)	34s
test-webkit-webworker (ubuntu-latest, lts/*)	12s
test-webkit-webworker (macos-latest, lts/*)	1m 18s
release	0s
	14m 58s

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