Fix json output handling for genericmiot

[rytilahti]

This fixes the json output for genericmiot.

❯ miiocli --output json genericmiot --ip 127.0.0.1 --token 00000000000000000000000000000000 status|jq
{
  "vacuum:status": 6,
  "vacuum:fault": 1139,
  "vacuum:mode": 1,
  "vacuum:sweep-type": 2,
  "vacuum:on": "piid 9",
  "battery:battery-level": 66,
  "alarm:alarm": 1,
  "alarm:volume": 4,
  "sweep:repeat-state": 0,
  "sweep:door-state": 3,
  "sweep:cloth-state": 0,
  "sweep:suction-state": 2,
  "sweep:water-state": 1,
  "sweep:mop-route": 0,
  "sweep:side-brush-life": 53,
  "sweep:side-brush-hours": 21,
  "sweep:main-brush-life": 15,
  "sweep:main-brush-hours": 98,
  "sweep:hypa-life": 93,
  "sweep:hypa-hours": 45,
  "sweep:mop-life": 99,
  "sweep:mop-hours": 35,
  "sweep:time-zone": -81734,
  "sweep:cur-lang": "piid 21",
  "sweep:cleaning-time": 62,
  "sweep:cleaning-area": 708,
  "sweep:multi-prop-vacuum": "piid 45",
  "sweep:tank-shake": 1,
  "sweep:shake-shift": 3,
  "order:all-enable-count": "piid 18",
  "point-zone:target-point": "piid 5",
  "map:remember-state": 0,
  "map:cur-map-id": 1577155194,
  "map:map-num": 5,
  "map:cur-cleaning-path": "piid 5",
  "map:build-map": 0,
  "map:has-new-map": 0,
  "disturb:dnd-enable": 0,
  "disturb:dnd-start-hour": 1,
  "disturb:dnd-start-minute": 4,
  "disturb:dnd-end-hour": 8,
  "disturb:dnd-end-minute": 9,
  "disturb:multi-prop-dnd": "piid 7"
}

[codecov-commenter]

Codecov Report

Merging #1674 (1ed823d) into master (1462e11) will decrease coverage by 0.02%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #1674      +/-   ##
==========================================
- Coverage   80.04%   80.01%   -0.03%     
==========================================
  Files         161      161              
  Lines       16131    16136       +5     
  Branches     3635     3637       +2     
==========================================
  Hits        12912    12912              
- Misses       2956     2960       +4     
- Partials      263      264       +1     

Impacted Files	Coverage Δ
miio/devicestatus.py	89.15% <0.00%> (-2.21%)	⬇️
miio/integrations/genericmiot/genericmiot.py	25.35% <0.00%> (-0.37%)	⬇️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more