v0.3.0-alpha

WIP adaptations to support future Boavizta API v0.3.x.

What's Changed

• chore(deps): bump lambda_http from 0.7.3 to 0.8.0 by @dependabot in #252
• chore(deps): bump lambda_runtime from 0.7.3 to 0.8.0 by @dependabot in #250
• chore(deps): bump serde from 1.0.160 to 1.0.163 by @dependabot in #270
• chore(deps): bump tokio from 1.27.0 to 1.28.1 by @dependabot in #269
• Adapt to api v0.3.x by @demeringo in #273

Full Changelog: v0.2.4...v0.3.0-alpha