Update kotlinx.serialization to v1.9.0

[solrbot]

This PR contains the following updates:

Package	Type	Update	Change
org.jetbrains.kotlinx:kotlinx-serialization-json	dependencies	minor	1.8.0 -> 1.9.0
org.jetbrains.kotlinx:kotlinx-serialization-core	dependencies	minor	1.8.0 -> 1.9.0

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Release Notes

Kotlin/kotlinx.serialization (org.jetbrains.kotlinx:kotlinx-serialization-json)

v1.9.0

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This release updates Kotlin version to 2.2.0, includes several bugfixes and provides serializers for kotlin.time.Instant.

Add kotlin.time.Instant serializers

Instant class was moved from kotlinx-datetime library to Kotlin standard library.
As a result, kotlinx-datetime 0.7.0 no longer has serializers for the Instant class.
To use new kotlin.time.Instant class in your @​Serializable classes,
you can use this 1.9.0 kotlinx-serialization version (Kotlin 2.2 is required).
You can choose between default InstantSerializer which uses its string representation,
or specify InstantComponentSerializer that represents instant as its components.
See details in the PR.

Other bugfixes

• Fix resize in JsonPath (#​2995)
• Fixed proguard rules for obfuscation to work correctly (#​2983)

v1.8.1

==================

This release updates Kotlin version to 2.1.20, while also providing several important improvements
and bugfixes.

Improvements

• Implemented encoding null in key and value of a map in Protobuf (#​2910)
• Make type argument in JsonTransformingSerializer nullable (#​2911)
• Use SPDX identifier in POMs (#​2936) (thanks to Leon Linhart)
• Add watchosDeviceArm64 to Okio integration module (#​2920) (thanks to Daniel Santiago)
• Update kotlinx-io version to 0.6.0 (#​2933) (thanks to Piotr Krzemiński)

Bugfixes

• Fix incorrect enum coercion during deserialization from JsonElement (#​2962)
• Supply proper equals(), hashCode(), and toString() for SerialDescriptor() wrapper (#​2942)
• Do not encode empty packed collections in protobuf (#​2907)

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