Validate Slider step

[AkmalFairuz]

pmforms/src/dktapps/pmforms/element/Slider.php

Lines 70 to 77 in 80b10df

	public function validateValue($value) : void{
	if(!is_float($value) and !is_int($value)){
	throw new FormValidationException("Expected float, got " . gettype($value));
	}
	if($value < $this->min or $value > $this->max){
	throw new FormValidationException("Value $value is out of bounds (min $this->min, max $this->max)");
	}
	}

[PJZ9n]

This is related to #13 , but there is an error in floating point numbers ...