Fahrenheit mode not working.

[L00PERY]

Checklist

• I updated the card to the latest version available
• I cleared the cache of my browser

Describe the bug
Activating Fahrenheit mode does not convert C to F. VPD is calculated wrong.

Version of the card
Version: 1.6.0

To Reproduce
This is the configuration I used:
type: custom:ha-vpd-chart
vpd_phases:

• upper: 0
  className: gray-danger-zone
  color: "#999999"
• lower: 0
  upper: 0.4
  className: under-transpiration
  color: "#1a6c9c"
• lower: 0.4
  upper: 0.8
  className: early-veg
  color: "#22ab9c"
• lower: 0.8
  upper: 1.2
  className: late-veg
  color: "#9cc55b"
• lower: 1.2
  upper: 1.6
  className: mid-late-flower
  color: "#e7c12b"
• lower: 1.6
  className: danger-zone
  color: "#ce4234"
  sensors:
• name: S1
  humidity: sensor.aranet4_24a14_humidity
  temperature: sensor.aranet4_24a14_temperature
  is_bar_view: false
  min_temperature: 5
  max_temperature: 100
  min_humidity: 10
  max_humidity: 90
  min_height: 200
  leaf_temperature_offset: 2
  enable_tooltip: true
  air_text: Air
  rh_text: RH
  kpa_text: kPa
  enable_axes: true
  enable_ghostclick: true
  enable_ghostmap: true
  enable_triangle: true
  enable_crosshair: false
  enable_fahrenheit: true
  enable_zoom: true
  enable_show_always_informations: true
  enable_legend: true
  ghostmap_hours: 24
  unit_temperature: °F
  grid_options:
  rows: 4
  columns: 12

Screenshots

Expected behavior
Seems to be calculating VPD based on C when sensor reports in F.

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• Browser: firefox, chrome

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Additional context