Support more IPLD types

[achingbrain]

js-IPFS has separate IPLD config for node and the browser that omits some of the more obscure heavyweight types to save on bundle size.

From what I can see this module only supports dag-pb, dag-cbor and raw types.

It should probably follow a similar strategy to include more types.

It'll also help us fix up the "Explore the Etherum Blockchain" example - #1453

[mikeal]

FYI, the next major version of the new Block API will probably chop this down even more, potentially shipping with nothing except for raw and asking the user to configure each codec you want to support.

We’re trying to get our default bundle sizes much lower and shipping codecs you don’t use are a big source of bundle bloat from IPLD.

[alanshaw]

We could expose a loadFormat option or might be worth including IPLD like in ipfs-inactive/js-ipfs-http-client#755?

[achingbrain]

Fixed in #3073