Ensure all statuses are checked (do not short-circuit on errors / failures)

[dlongley]

We check all matching statuses in parallel (which is good) here: https://github.com/digitalbazaar/vc-bitstring-status-list/blob/main/lib/index.js#L308 ... however, we need to ensure that all the checks happen and we don't shortcircuit all of them if just one fails. This can be done either by using Promise.allSettled and writing some mapping code on the results, or probably more simply by making _checkStatus wrap everything internally in a try/catch that catches any error and maps it to {verified: false, error}.