v0.2.3: Manually set bounds, Improved color thresholds & more

• New: Option color_thresholds (#45)
• New: Color thresholds now changes dynamically with the history (#45)
• New: Options lower_bound & upper_bound added (#40)
• New: Option color to entity object, overrides other color options
• Change: entities option now always requires a list, changed in order to be compatible with "Unused entities" UI (#44) (BREAKING CHANGE)`
• Change: Default value for points_per_hour changed from 1 to 0.5.
• Fixed: Updated lit-element to v2.0.1
• Fixed: Zero values show up as current value when hovered over (#41)
• Fixed: Added additional checks for empty history
• Removed: entity option, which was previously deprecated since v0.2.0, use entities option (#44) (BREAKING CHANGE).
• Removed: line_color_above and line_color_below, see new color_thresholds option (#45) (BREAKING CHANGE)