signed/unsigned support?

[gmarinov]

Congrats on keeping wavefile alive.

Looks like.fromScratch() forces the signed flag of the file automatically from bit depth and format?

prx-wavefile/lib/wavefile-creator.js

Lines 691 to 702 in b904b07

	updateDataType_() {
	this.dataType = {
	bits: ((parseInt(this.bitDepth, 10) - 1) | 7) + 1,
	fp: this.bitDepth == "32f" || this.bitDepth == "64",
	signed: this.bitDepth != "8",
	be: this.container == "RIFX"
	};
	if (["4", "8a", "8m"].indexOf(this.bitDepth) > -1) {
	this.dataType.bits = 8;
	this.dataType.signed = false;
	}
	}

Do you plan to support signed 8-bit and unsigned 16-bit audio?
Would be useful to write in the docs that it forces the format if not.

Thanks in advance