v1.0.0

The estimator is an object you create and keep: every counting function takes it
first, so one count can be saved, resumed, read at any point, and carried across
several sources.

Breaking

• Requires Node 20 or newer.
• estimateDistinct(estimator, source, options). epsilon, delta,
  expectedSize, seed and random belong to new CVM() alone; the options of
  the counting functions cover only how values reach it.
• Sources are split by kind: estimateDistinctSync for an iterable you already
  hold, estimateDistinct for an async iterable or a Readable. Each refuses
  the other's sources and names the one to call, and the synchronous one takes no
  signal.
• keyFn's parameter follows the element type of the source, so over an Order[]
  a wrong field is a compile error where it used to be any. TypeScript only:
  the runtime is unchanged.
• DistinctEstimateStream is replaced by createEstimatorSink(estimator, options).
  The count is read from the estimator, so the sink has no result().
• expectedSize is required and must be at least 1. A snapshot written by 0.4
  without it carries 0 and no longer restores.

Fixed

• An abort lands while the source is waiting, not only between values.
• A signal already aborted before the call rejects with ABORT_ERR on a
  Readable source too, instead of Node 24's ERR_STREAM_UNABLE_TO_PIPE.
• createRandom throws with CVM_INVALID_OPTION on a bad seed, the one error
  that carried no code.

The hand-written types are now typechecked as a consumer compiles them, in CI and
before publishing.