New features

• Greenfield: Lightning addresses API (#4546) @kukks

Bug fixes

• Fix several HTML injections (#4545) @NicolasDorier
• BIP21: Uppercase addresses only in QR, not in payment URL (#4553) @dennisreimann
• Checkout v2: UI fixes (#4552) @dennisreimann

Improvement

• Checkout v2: Re-add LNURL for top-up invoices (#4556) @dennisreimann