chore: update launchdarkly-node-client-sdk to 3.4.0#15

kinyoklion merged 2 commits into

mainlaunchdarkly/hello-node-client:mainfrom

devin/1783933788-update-node-client-sdklaunchdarkly/hello-node-client:devin/1783933788-update-node-client-sdkCopy head branch name to clipboard