Bump plugin.serialization from 2.0.21 to 2.1.0

Bumps [plugin.serialization](https://github.com/JetBrains/kotlin) from 2.0.21 to 2.1.0.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v2.1.0/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.0.21...v2.1.0)

---
updated-dependencies:
- dependency-name: plugin.serialization
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

fuel-kotlinx-serialization/build.gradle.kts

@@ -4,7 +4,7 @@ import org.jetbrains.kotlin.gradle.targets.js.dsl.ExperimentalWasmDsl
 
 plugins {
     kotlin("multiplatform")
-    kotlin("plugin.serialization") version "2.0.21"
+    kotlin("plugin.serialization") version "2.1.0"
     id("publication")
     id("org.jetbrains.kotlinx.kover")
 }