TypeError: writeUint32LE is not a function

Hi thank you for this library. It makes my life easier :)

I have some problem with this code. It tries to call `writeUint32LE`, but it seems to be undefined.

```javascript
function ttf2eot(arrayBuffer) {
const arr = Buffer.from(arrayBuffer);

const out = Buffer.alloc(SIZEOF.EOT_PREFIX, 0);

out.writeUint32LE(arr.length, EOT_OFFSET.FONT_LENGTH);
out.writeUint32LE(MAGIC.EOT_VERSION, EOT_OFFSET.VERSION);
// other code ...
}
```

I found a stackoverflow anser here https://stackoverflow.com/a/38543218/2638899
saying that i could use DataView

```js
var dataview = new DataView(arrayBuffer);
dataView.setUint32(0,value);
return dataView.getFloat32(0);
```
My problem is that `ttf2eot` function is based on `Buffer` and refactor it with `DataView` is not doable.

Do you have any suggestions? Can i use another method instead of `writeUint32LE`?