chore: upgrade kotlin → 1.9.0-RC

[sgammon]

Summary

Adds support for Kotlin at 1.9.0-RC; mostly filing so people can find this fork to do early tests if they want to. It requires a special repository to pull the new version of Compose.

Changelog

• chore: upgrade kotlin sdk → 1.9.0-RC
• chore: upgrade compose compiler → 1.4.8-beta
• chore: add jetbrains dev repo for compose compiler

[sgammon]

can try this new version with:

settings.gradle.kts:

pluginManagement {
  repositories {
    gradlePluginPortal()
    maven("https://maven.pkg.github.com/sgammon/mosaic")
  }
}

dependencyManagement {
  repositories {
    mavenCentral()
    maven("https://maven.pkg.github.com/sgammon/mosaic")
    maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
  }
}

build.gradle.kts:

buildscript {
  dependencies {
    classpath("com.jakewharton.mosaic:mosaic-gradle-plugin:8.0.0-beta1")
  }
}

[JakeWharton]

Hi! Thanks for taking time to send a PR. Generally I do not update to pre-release versions since it's a lot to manage. 1.9 support was added in #199 and recently released.

I also am adding the ability to specify a custom Compose compiler version (or whole artifact coordinates) in #207 so that no one should be blocked on upgrading their Kotlin version by this library.

[sgammon]

thanks @JakeWharton :) no worries, wasn't intending to ask for merge