fix(deps): update dependency org.jetbrains.kotlinx:kotlinx-coroutines-core to v1.6.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.jetbrains.kotlinx:kotlinx-coroutines-core	1.6.1 -> 1.6.4

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Release Notes

Kotlin/kotlinx.coroutines

v1.6.4

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• Added TestScope.backgroundScope for launching coroutines that perform work in the background and need to be cancelled at the end of the test (#​3287).
• Fixed the POM of kotlinx-coroutines-debug having an incorrect reference to kotlinx-coroutines-bom, which cause the builds of Maven projects using the debug module to break (#​3334).
• Fixed the Publisher.await functions in kotlinx-coroutines-reactive not ensuring that the Subscriber methods are invoked serially (#​3360). Thank you, @​EgorKulbachka!
• Fixed a memory leak in withTimeout on K/N with the new memory model (#​3351).
• Added the guarantee that all Throwable implementations in the core library are serializable (#​3328).
• Moved the documentation to https://kotlinlang.org/api/kotlinx.coroutines/ (#​3342).
• Various documentation improvements.

v1.6.3

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• Updated atomicfu version to 0.17.3 (#​3321), fixing the projects using this library with JS IR failing to build (#​3305).

v1.6.2

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• Fixed a bug with ThreadLocalElement not being correctly updated when the most outer suspend function was called directly without kotlinx.coroutines (#​2930).
• Fixed multiple data races: one that might have been affecting runBlocking event loop, and a benign data race in Mutex (#​3250, #​3251).
• Obsolete TestCoroutineContext is removed, which fixes the kotlinx-coroutines-test JPMS package being split between kotlinx-coroutines-core and kotlinx-coroutines-test (#​3218).
• Updated the ProGuard rules to further shrink the size of the resulting DEX file with coroutines (#​3111, #​3263). Thanks, @​agrieve!
• Atomicfu is updated to 0.17.2, which includes a more efficient and robust JS IR transformer (#​3255).
• Kotlin is updated to 1.6.21, Gradle version is updated to 7.4.2 (#​3281). Thanks, @​wojtek-kalicinski!
• Various documentation improvements.

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