check_suite messages can have multiple PRs

[pathawks]

Utterson/aws/lambda/index.js

Lines 34 to 35 in f0ea01a

	if (json["action"] === "requested" || json["action"] === "rerequested") {
	pull_request = json["check_suite"]["pull_requests"][0];

Currently, we are only processing the first PR in a check_suite message. We should probably loop through all of them.