v0.0.1-beta.21

Changelog

• Fix #807: Upgraded iOS SDK to v3.8.3, as versions v3.7.0 and lower were susceptible to a crash on iOS 18 when accepting payments with paymentIntent.amount greater than 99999 (e.g. USD charge of 999.99).
• Fix #789: Improved reader connection call refresh handling to address timeouts when initializing the SDK.

What's Changed

• Bump ios sdk version to 3.8.3 by @tim-lin-bbpos in #800
• Fix connection issue by @ianlin-bbpos in #791

Full Changelog: v0.0.1-beta.20...v0.0.1-beta.21