Sets or gets a range slider's type.
The sliderType can be set to one of the following:
'Continuous': A continuous range slider allows site visitors to select
any value within the range you set. The handles move smoothly at a step value of 0.1, along
the slider's track.'Stepped': A stepped range slider only allows site visitors to select specific
values within the set range. The handles move along tick marks displayed underneath the stepped
slider's track. The tick marks are based on a step value that can be adjusted by setting
the step property.