svg-path-sdf 
Create signed distance field for an svg path data.
Usage
```js
let pathSdf = require('svg-path-sdf')
let arr = pathSdf('M40,0A40,40 0 1,1 0,-40A40,40 0 0,1 40,0Z', {
width: 200,height: 200arr has 200×200 elements with value from 0..1 range, corresponding to distance. The path is drawn at the center of the sdf fitting to the minimum side.
distances = pathSdf(path, options|shape?)
Option | Meaning ---|---width,w, height,h or shape | Output sdf size in px, defaults to 200×200.
cutoff, radius | SDF parameters for bitmap-sdf, by default detected from shape to fit min side.
viewBox | View box for the path data. If not defined, it is detected as path bounds via svg-path-bounds.
stroke | Whether to stroke shape. Positive number will stroke outside the amount of pixels, negative number will stroke inside, 0-ish will disable stroke.
