Don't start the ping-pong until we get a hello.
Don't start the ping-pong until we get a hello.

slackapi/node-slack-sdk,slackapi/node-slack-sdk,slackapi/node-slack-sdk,slackhq/node-slack-client,slackapi/node-slack-sdk,peernohell/node-slack-client,peernohell/node-slack-client,slackhq/node-slack-sdk