Bump kotlinx-coroutines-test from 1.6.3 to 1.6.4

Bumps [kotlinx-coroutines-test](https://github.com/Kotlin/kotlinx.coroutines) from 1.6.3 to 1.6.4.
- [Release notes](https://github.com/Kotlin/kotlinx.coroutines/releases)
- [Changelog](https://github.com/Kotlin/kotlinx.coroutines/blob/master/CHANGES.md)
- [Commits](Kotlin/kotlinx.coroutines@1.6.3...1.6.4)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlinx:kotlinx-coroutines-test
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

build.gradle.kts

@@ -92,7 +92,7 @@ val dependencyVersions = listOf(
   "org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:1.6.3",
   "org.jetbrains.kotlinx:kotlinx-coroutines-debug:1.6.3",
   "org.jetbrains.kotlinx:kotlinx-coroutines-jdk8:1.6.3",
-  "org.jetbrains.kotlinx:kotlinx-coroutines-test:1.6.3"
+  "org.jetbrains.kotlinx:kotlinx-coroutines-test:1.6.4"
 )
 
 val dependencyGroupVersions = mapOf(