CID equality

[achingbrain]

We compare CIDs in our tests in lots (and lots) of places. E.g:

assert.deepEqual(cid1, cid2)

With v10 these checks have started failing where one of these CIDs has been read out of a byte array and does not occupy the entire byte array because of the now enumerable byteOffset property, for example here, blocking ipld/js-dag-pb#59.

[Gozala]

That probably can be easily fixed by turning these to getters that just return this.bytes.byteOffset / this.bytes.byteLength

js-multiformats/src/cid.js

Lines 81 to 85 in 0ec751a

	// ArrayBufferView
	/** @readonly */
	this.byteOffset = bytes.byteOffset
	/** @readonly */
	this.byteLength = bytes.byteLength