* 4.0.0-1 (Sam Roberts)
 * Add support for wss:// control channel (Miroslav Bajtoš)
 * test: prevent sl-run from screwing TAP output (Miroslav Bajtoš)
 * Disable MQTT connection (Miroslav Bajtoš)
 * Emit CPU and memory usage from appmetrics (Miroslav Bajtoš)
 * heart-beat: add a heart-beat watcher (Behnam Hajian)
 * Remove strong-agent as dependency (Behnam Hajian)
 * lint: fix style warnings in lib/logger.js (Ben Noordhuis)
 * Refer to licenses with a link (Sam Roberts)