fix(deps): update kotlin monorepo to v2.1.21 (#1963)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [org.jetbrains.kotlin:kotlin-serialization](https://kotlinlang.org/)
([source](https://redirect.github.com/JetBrains/kotlin)) | `2.1.20` ->
`2.1.21` |
[![age](https://developer.mend.io/api/mc/badges/age/maven/org.jetbrains.kotlin:kotlin-serialization/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/org.jetbrains.kotlin:kotlin-serialization/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/org.jetbrains.kotlin:kotlin-serialization/2.1.20/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/org.jetbrains.kotlin:kotlin-serialization/2.1.20/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
| [org.jetbrains.kotlin:kotlin-gradle-plugin](https://kotlinlang.org/)
([source](https://redirect.github.com/JetBrains/kotlin)) | `2.1.20` ->
`2.1.21` |
[![age](https://developer.mend.io/api/mc/badges/age/maven/org.jetbrains.kotlin:kotlin-gradle-plugin/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/org.jetbrains.kotlin:kotlin-gradle-plugin/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/org.jetbrains.kotlin:kotlin-gradle-plugin/2.1.20/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/org.jetbrains.kotlin:kotlin-gradle-plugin/2.1.20/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
| [org.jetbrains.kotlin:kotlin-bom](https://kotlinlang.org/)
([source](https://redirect.github.com/JetBrains/kotlin)) | `2.1.20` ->
`2.1.21` |
[![age](https://developer.mend.io/api/mc/badges/age/maven/org.jetbrains.kotlin:kotlin-bom/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/org.jetbrains.kotlin:kotlin-bom/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/org.jetbrains.kotlin:kotlin-bom/2.1.20/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/org.jetbrains.kotlin:kotlin-bom/2.1.20/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
| [org.jetbrains.kotlin.jvm](https://kotlinlang.org/)
([source](https://redirect.github.com/JetBrains/kotlin)) | `2.1.20` ->
`2.1.21` |
[![age](https://developer.mend.io/api/mc/badges/age/maven/org.jetbrains.kotlin.jvm:org.jetbrains.kotlin.jvm.gradle.plugin/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/org.jetbrains.kotlin.jvm:org.jetbrains.kotlin.jvm.gradle.plugin/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/org.jetbrains.kotlin.jvm:org.jetbrains.kotlin.jvm.gradle.plugin/2.1.20/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/org.jetbrains.kotlin.jvm:org.jetbrains.kotlin.jvm.gradle.plugin/2.1.20/2.1.21?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Release Notes

<details>
<summary>JetBrains/kotlin
(org.jetbrains.kotlin:kotlin-serialization)</summary>

###
[`v2.1.21`](https://redirect.github.com/JetBrains/kotlin/releases/tag/v2.1.21):
Kotlin 2.1.21

##### Changelog

##### Backend. Native. Debug

- [`KT-75991`](https://youtrack.jetbrains.com/issue/KT-75991) Xcode
16.3: Fix lldb stepping test over an inline function

##### Compiler

- [`KT-75992`](https://youtrack.jetbrains.com/issue/KT-75992) Xcode
16.3: stacktraces on simulators are not symbolicated
- [`KT-76663`](https://youtrack.jetbrains.com/issue/KT-76663) KJS:
KotlinNothingValueException caused by expression return since 2.1.20
- [`KT-75756`](https://youtrack.jetbrains.com/issue/KT-75756) Backend
Internal error: Exception during IR lowering when trying to access
variable from providedProperties in class within kotlin custom script
- [`KT-76209`](https://youtrack.jetbrains.com/issue/KT-76209)
CONFLICTING_UPPER_BOUNDS on `Nothing` bound
- [`KT-70352`](https://youtrack.jetbrains.com/issue/KT-70352) K2:
False-negative CONFLICTING_UPPER_BOUNDS on `Nothing` bound
- [`KT-74739`](https://youtrack.jetbrains.com/issue/KT-74739) Native:
"IllegalArgumentException: All constructors should've been lowered:
FUNCTION_REFERENCE"
- [`KT-75483`](https://youtrack.jetbrains.com/issue/KT-75483) Native:
redundant unboxing generated with smart cast
- [`KT-71425`](https://youtrack.jetbrains.com/issue/KT-71425) IR
Inliner: investigate return type of an inlined block

##### Native

- [`KT-76252`](https://youtrack.jetbrains.com/issue/KT-76252) Native:
executable crash with generic value classes with 2.1.20

##### Native. C and ObjC Import

- [`KT-75781`](https://youtrack.jetbrains.com/issue/KT-75781) Xcode
16.3: Fix cinterop tests failing with fatal error: could not build
module '\_stdint'

##### Native. Runtime. Memory

- [`KT-74280`](https://youtrack.jetbrains.com/issue/KT-74280) Native:
GC.collect crashes with -Xallocator=std

##### Tools. CLI

- [`KT-75588`](https://youtrack.jetbrains.com/issue/KT-75588)
\[2.1.20-RC] "was compiled by a pre-release version of Kotlin and cannot
be loaded by this version of the compiler" warnings despite using the
same compiler version
- [`KT-74663`](https://youtrack.jetbrains.com/issue/KT-74663) kotlinc-js
CLI: not providing -ir-output-dir results in NullPointerException

##### Tools. Compiler Plugins

- [`KT-76162`](https://youtrack.jetbrains.com/issue/KT-76162)
"IllegalStateException: No mapping for symbol: VALUE_PARAMETER
INSTANCE_RECEIVER" after updating to 2.1.20

##### Tools. Gradle

- [`KT-73682`](https://youtrack.jetbrains.com/issue/KT-73682)
Compatibility with Gradle 8.12 release
- [`KT-73142`](https://youtrack.jetbrains.com/issue/KT-73142) Kotlin
Gradle plugin: Remove usage of Gradle's internal ExecHandleBuilder
- [`KT-36004`](https://youtrack.jetbrains.com/issue/KT-36004) Update
'org.gradle.usage' attribute rules to support the 'JAVA_API' and
'JAVA_RUNTIME' value
- [`KT-73968`](https://youtrack.jetbrains.com/issue/KT-73968)
KotlinDependencyManagement tries to mutate configuration after it was
resolved
- [`KT-73684`](https://youtrack.jetbrains.com/issue/KT-73684) Run
integration tests against Gradle 8.12
- [`KT-72694`](https://youtrack.jetbrains.com/issue/KT-72694) Accessing
Task.project during execution is being deprecated in Gradle 8.12
- [`KT-73683`](https://youtrack.jetbrains.com/issue/KT-73683) Compile
against Gradle API 8.12

##### Tools. Gradle. JS

- [`KT-77119`](https://youtrack.jetbrains.com/issue/KT-77119) KJS:
Gradle: Setting custom environment variables in KotlinJsTest tasks no
longer works
- [`KT-74735`](https://youtrack.jetbrains.com/issue/KT-74735) KGP uses
Gradle internal `CompositeProjectComponentArtifactMetadata`
- [`KT-71879`](https://youtrack.jetbrains.com/issue/KT-71879) Notice of
upcoming deprecation for Boolean 'is-' properties in Gradle Groovy
scripts

##### Tools. Gradle. Multiplatform

- [`KT-75808`](https://youtrack.jetbrains.com/issue/KT-75808) KGP: MPP
with jvm target and Gradle java-test-fixtures is broken
- [`KT-75605`](https://youtrack.jetbrains.com/issue/KT-75605) Dependency
resolution fails in commonTest/nativeTest source sets for KMP module
when depending on another project due to missing PSM
- [`KT-75512`](https://youtrack.jetbrains.com/issue/KT-75512)
Maven-publish: ArtifactId is not correct in`pom` file with customized
`withXml`

##### Tools. Incremental Compile

- [`KT-62555`](https://youtrack.jetbrains.com/issue/KT-62555) Wrong ABI
fingerprint for inline function containing a lambda
- [`KT-75883`](https://youtrack.jetbrains.com/issue/KT-75883) Follow-up:
switch from INSTANCE heuristic to outerClass chain

##### Tools. Kapt

- [`KT-75936`](https://youtrack.jetbrains.com/issue/KT-75936) K2 KAPT:
unsupported FIR element kinds in constant evaluation
- [`KT-75942`](https://youtrack.jetbrains.com/issue/KT-75942) K2 KAPT:
underscore not allowed here

##### Tools. Scripts

- [`KT-76424`](https://youtrack.jetbrains.com/issue/KT-76424)
Dependencies in main.kts not working with 2.1.20
- [`KT-76296`](https://youtrack.jetbrains.com/issue/KT-76296) Kotlin
script compiler crashes when secondary constructor calls a function
- [`KT-75589`](https://youtrack.jetbrains.com/issue/KT-75589) Scripts:
"IndexOutOfBoundsException in
jdk.internal.util.Preconditions.outOfBounds" when trying to extend a
class which uses global variable

##### Tools. Wasm

- [`KT-76161`](https://youtrack.jetbrains.com/issue/KT-76161) Wasm:
"export startUnitTests was not found" after updating to Kotlin 2.1.20

</details>

---

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---

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---

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.github/workflows/test-gradle-project-using-bindings-server/build.gradle.kts

@@ -1,7 +1,7 @@
 import java.net.URI
 
 plugins {
-    kotlin("jvm") version "2.1.20"
+    kotlin("jvm") version "2.1.21"
 }
 
 repositories {

buildSrc/build.gradle.kts

@@ -6,10 +6,10 @@ plugins {
 }
 
 dependencies {
-    implementation(platform("org.jetbrains.kotlin:kotlin-bom:2.1.20"))
+    implementation(platform("org.jetbrains.kotlin:kotlin-bom:2.1.21"))
 
-    implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:2.1.20")
-    implementation("org.jetbrains.kotlin:kotlin-serialization:2.1.20")
+    implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:2.1.21")
+    implementation("org.jetbrains.kotlin:kotlin-serialization:2.1.21")
 
     implementation("io.gitlab.arturbosch.detekt:detekt-gradle-plugin:1.23.8")
     implementation("org.jmailen.gradle:kotlinter-gradle:5.0.2")