Defines a LineOptions object, to define the configuration options to display the crosshair over the hover/touch area
(showCursorCategoryLine or showCursorValueLine)
The LineOptions property defines the size, color and style of the axis, grid or
tick-lines. The LineOptions property is applied to crossover axes (the dotted
black lines in the following screen shots). The
Color property specifies the line's color. The Style
property defines the style of the line. The Width
property specifies the line's width or size (1 by default).
