Configurable strategy for minting URIs

[tpluscode]

I would add an options{} object to the default function and put this function as an optional parameter.

Just in case one doesn't want to use nanoid() to mint URIs (for use, for example, use incremental integers instead).

The default would be nanoid()

_Originally posted by @cristianvasquez in https://github.com/hypermedia-app/shaperone/pull/236#discussion_r959607175_