Use title attribute from input element

[FQ400]

Example
https://jsfiddle.net/p0m3aq8o/

Describe the bug
It isn't a bug. It is a feature.
When I add a title to the input I like to transform into a slider I assume to see the title when I hover over the slider.

To Reproduce
Steps to reproduce the behavior:

1. Open the provided link
2. Hover over the slider
3. There is no title "accessability matters"

Expected behavior
When a title attribute is present on an input it should be used as a title on the container-div.

Screenshots
This is my expectation:

Desktop (please complete the following information):

• OS: MacOS
• Browser Firefox
• Version 67.0

Additional context
I think it could be implemented here:

rangeSlider/src/range-slider.js

Lines 107 to 112 in 2743f96

	this.container = document.createElement('div');
	dom.addClass(this.container, this.options.fillClass);
	directionClass = this.vertical ? this.options.fillClass + '__vertical' : this.options.fillClass + '__horizontal';
	dom.addClass(this.container, directionClass);