Unit Tests, and Fixes Due to Them

First release after adding unit tests to the Simple Switch. Unit tests are not 100% complete, but have already identified a bug; specifically, that the Switch would not acquire the checked state properly from the checkbox element beneath it. This is now fixed.

Material Mode + Small Cleanup

Adds the Material mode to the Switch, which causes the Switch to match the Material.io specification for a Switch UI element.

Dynamic Sizing and CSS Variables

The Switch will now dynamically size itself to the set font size, so that it matches the size of any label it is adjacent to.

This primarily uses CSS Variables to do so, but there is a fallback using the CSS @supports to make sure that this still works on older browsers.

Minor Updates

Minor updates to the core Switch class (mostly internal), and serious improvements to documentation.

First Release

First release; contains basic working model of the code.