v5.0.0

What's Changed

• Update to major version 5.0.0 as there is a new AppEngine Mail API setting to enable external mail providers.
• Update dependency com.google.cloud:google-cloud-logging to v3.26.0 by @renovate-bot in #477
• Update all non-major dependencies by @renovate-bot in #478
• Update all non-major dependencies by @renovate-bot in #479
• Update all non-major dependencies to v2.9.0 by @renovate-bot in #480

Full Changelog: v4.0.2...v5.0.0