Fix regression in R023, float64 has become string

[bluecmd]

E.g. new power readings:

{
  "input-power": {
    "avg": "-60",
    "instant": "-60",
    "max": "-60",
    "min": "-60"
  },
  "laser-bias-current": {
    "avg": "0",
    "instant": "0",
    "max": "0",
    "min": "0"
  },
  "output-power": {
    "avg": "-60",
    "instant": "-60",
    "max": "-60",
    "min": "-60"
  }
}

This is the same for temperatures.

W0727 21:59:43.757328   23777 main.go:167] Failed to parse metric update: failed to parse general laser metric: json: cannot unmarshal string into Go struct field .input-power.Instant of type float64

[robo-kamel]

🎉 This issue has been resolved in version 0.9.4 🎉

The release is available on GitHub release

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