[Bug] HOOBS Server 
**Describe the bug**
HOOBS Server stops when Shelly bulb switches on

**Log output**
25.8.2020, 12:31:14 [eveatmo platform] Loading new data from API for: weatherstation
25.8.2020, 12:38:35 TypeError: Cannot read property 'type' of null
    at Immediate.<anonymous> (/home/hoobs/.hoobs/node_modules/homebridge-shelly/abilities/color-lightbulb.js:184:23)
    at processImmediate (internal/timers.js:456:21)
25.8.2020, 12:38:35 TypeError: Cannot read property 'type' of null
    at Immediate.<anonymous> (/home/hoobs/.hoobs/node_modules/homebridge-shelly/abilities/color-lightbulb.js:184:23)
    at processImmediate (internal/timers.js:456:21)
25.8.2020, 12:38:35 Got SIGTERM, shutting down Bridge...
25.8.2020, 12:39:17 [Refresh Services] connect ECONNREFUSED 127.0.0.1:51826

**Environment:**
 - Shelly device(s): Shelly Bulb
 - Plugin version: 0.14.0
 - Device running homebridge: Raspberry Pi
