Update dependency org.jetbrains.kotlinx:kotlinx-coroutines-test to v1.4.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.jetbrains.kotlinx:kotlinx-coroutines-test	1.4.0 -> 1.4.2

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Release Notes

Kotlin/kotlinx.coroutines

v1.4.2

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• Fixed StackOverflowError in Job.toString when Job is observed in its intermediate state (#​2371).
• Improved liveness and latency of Dispatchers.Default and Dispatchers.IO in low-loaded mode (#​2381).
• Improved performance of consecutive Channel.cancel invocations (#​2384).
• SharingStarted is now fun interface (#​2397).
• Additional lint settings for SharedFlow to catch programmatic errors early (#​2376).
• Fixed bug when mutex and semaphore were not released during cancellation (#​2390, thanks to @​Tilps for reproducing).
• Some corner cases in cancellation propagation between coroutines and listenable futures are repaired (#​1442, thanks to @​vadimsemenov).
• Fixed unconditional cast to CoroutineStackFrame in exception recovery that triggered failures of instrumented code (#​2386).
• Platform-specific dependencies are removed from kotlinx-coroutines-javafx (#​2360).

v1.4.1

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This is a patch release with an important fix to the SharedFlow implementation.

• SharedFlow: Fix scenario with concurrent emitters and cancellation of subscriber (#​2359, thanks to @​vehovsky for the bug report).

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