Bump kotlinx-coroutines-test from 1.4.2-native-mt to 1.6.3-native-mt

Bumps [kotlinx-coroutines-test](https://github.com/Kotlin/kotlinx.coroutines) from 1.4.2-native-mt to 1.6.3-native-mt.
- [Release notes](https://github.com/Kotlin/kotlinx.coroutines/releases)
- [Changelog](https://github.com/Kotlin/kotlinx.coroutines/blob/master/CHANGES.md)
- [Commits](https://github.com/Kotlin/kotlinx.coroutines/commits)

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

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

build.gradle

@@ -40,7 +40,7 @@ buildscript {
         ROBOLETRIC = '4.5.1'
         MOCKITO_INLINE = '3.8.0'
         ASSERT_J = '3.19.0'
-        COROUTINES = '1.4.2-native-mt'
+        COROUTINES = '1.6.3-native-mt'
         BARISTA = '3.9.0'
 
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