2.4.2

• Return zero length for day, hour, minute, and second periods whose boundary exclusions reverse the included endpoints and whose iterator yields no dates (#153).
• Preserve nonempty fractional/manual-constructor lengths, month/year iterator overrides, and existing daylight-saving behavior. PHP requirements and public signatures are unchanged.
• Use the Spatie-hosted README ad image.

Full Changelog: 2.4.1...2.4.2