Release 0.14.0

Added

• If the callback function passed toWakuStore.queryHistory returns true, then no further pages are retrieved from the store.
• Use webpack to build UMD bundle of the library, see README for usage.

Changed

• Breaking: Renamed WakuStore.QueryOptions's direction to pageDirection (and its type) as it only affects the page ordering,
  not the ordering of messages with the page.

Fixed

• Docs: Ensure that WakuStore's QueryOptions documentation is available online.