* Upgrade Gradle to version 8.5

See https://docs.gradle.org/8.5/release-notes.html.

* Upgrade Kotlin to version 1.9.21

See https://github.com/JetBrains/kotlin/releases/tag/v1.9.21.

* Upgrade Kotest to version 5.8.0

See https://github.com/kotest/kotest/releases/tag/v5.8.0.

* Upgrade Jimfs to version 1.3.0

See https://github.com/google/jimfs/releases/tag/v1.3.0.

* Upgrade Kodin to version 6.5.5

See https://github.com/kosi-libs/Kodein/releases/tag/v6.5.5. This seems
to be the latest version available that doe snot only have JavaDoc
artifacts published.

* Upgrade kotlinx-serialization to version 1.6.2

See https://github.com/Kotlin/kotlinx.serialization/releases/tag/v1.6.2.