d3-force-bounded-box

A D3 force. Inspired by https://bl.ocks.org/cmgiven/547658968d365bcc324f3e62e175709b

Examples:

``js
const boundedBox = require('d3-force-bounded-box')
const { forceSimulation } = require('d3-force');

const nodeData = [
{
size: 52,
x: 0,
y: 0,
vx: 0,
vy: 0,
}
]

const boxForce = boundedBox()
.bounds([[0, 0], [width, height]])
.size(d => [d.size, d.size]);

const simulation = forceSimulation(nodeData)
.force('boxForce', boxForce);
``