v3.1.0-dev.3

What's Changed

• Bump json_serializable and freezed by @dependabot in #81
• Bump com.android.tools.build:gradle from 8.7.0 to 8.7.3 in /android by @dependabot in #80
• Bump kotlin_version from 2.0.20 to 2.1.0 in /android by @dependabot in #79

Full Changelog: v3.1.0-dev.2...v3.1.0-dev.3