Remove jquery dependency

Remove MathQuill's jQuery dependency, and replace it with a few smaller internal libs:

A DOM builder function to replace usage of jQuery to parse html strings: https://github.com/mathquill/mathquill/blob/2573c3a3cf3a97a26fe65e3074b0fd424ca0bc41/src/dom.ts#L58-L62
A DOMFragment class to represent and manipulate a contiguous span of sibling DOM nodes. This is closely analogous to MathQuill's existing Fragment class used to represent and manipulate a contiguous span of sibling parse nodes. It replaces uses of jQuery for inserting/removing/moving DOM nodes and class manipulation: https://github.com/mathquill/mathquill/blob/2573c3a3cf3a97a26fe65e3074b0fd424ca0bc41/src/domFragment.ts#L2-L4

Replace's Mathquill's bespoke HTML string templating system DOMView to render an element to a DOM node given its child blocks: https://github.com/mathquill/mathquill/blob/2573c3a3cf3a97a26fe65e3074b0fd424ca0bc41/src/commands/math.ts#L80-L85

Example usage: https://github.com/mathquill/mathquill/pull/1031/files#diff-7c2d826f0b8e66e11528a7f992b1e755f0e505ac76dff64bb1f3f7ee1458c4b7L15-R22

Note: introduces a new interface version (v3) because there were a couple places that the public API was returning jQuery types (or passing them as parameters to callbacks). See changelog for details.

demosinc/mathquill PRs:

Fixes https://github.com/mathquill/mathquill/issues/1007 Fixes https://github.com/mathquill/mathquill/issues/929 Fixes https://github.com/mathquill/mathquill/issues/870 Fixes https://github.com/mathquill/mathquill/issues/670 Fixes https://github.com/mathquill/mathquill/issues/124

mathquill / mathquill

Remove jquery dependency #1031