Version of shpwrite.js on unpkg is out of date

Nobody has claimed this yet.

The version of shpwrite.js on unpkg is out of date.

For example, https://unpkg.com/@mapbox/shp-write@latest/shpwrite.js (which, at time of writing, redirects to version 0.4.3 at https://unpkg.com/@mapbox/shp-write@0.4.3/shpwrite.js) does not contain the latest code. If you search there for the `justType` function it reads as:

```js
function justType(type, TYPE) {
return function (gj) {
var oftype = gj.features.filter(isType(type));
return {
geometries: oftype.map(justCoords),
properties: oftype.map(justProps),
type: TYPE,
};
};
}
```

As opposed to what's in [geojson.js](https://github.com/mapbox/shp-write/blob/v0.4.3/src/geojson.js) for version 0.4.3:

https://github.com/mapbox/shp-write/blob/48a0fe72c09f74f6256ac8d4177af272d01317c3/src/geojson.js#L13-L22

Compare the published shpwrite.js at the unpkg URL with src/geojson.js at the referenced v0.4.3 commit, focusing on the justType function. Start by checking how this version is packaged and published, then verify that the unpkg artifact contains the latest source after release.

Written by the indexing model from the issue text.