chore(release): 4.5.0 (#569)

chore(release): 4.4.1 (#552)

chore(release): 4.4.0 (#550)

Promote the Unreleased section to 4.4.0 and bump the version.

Highlights (all additive, backwards-compatible):
- Task introspection: getNextRuns, match, msToNext, isBusy, runsLeft, getPattern (#547)
- cron.parse and cron.validateDetailed (#548)
- Distributed run coordination: distributed:true + NODE_CRON_RUN default + RunCoordinator (#549)

chore: release 4.3.0 (#539)