configfeature: deserializableProviderConfigfor TOML/env-driven setupFallbackMailer::from_configsbuilds a fallback chain from configs
- Lettermint on reqwest 0.12 via the
lettermint-reqwest-012feature
with_reqwest_clienttakes the version-agnosticbackend::Client
- Inject a custom
reqwest::Clientinto the Lettermint mailer
- SMTP provider (
smtpfeature) via lettre
- Upgrade postmark to 2.0
- Upgrade lettermint to 0.3
- Update dependencies
- Version bump