Bump kotlinx-coroutines-core from 1.6.3 to 1.6.4

Bumps [kotlinx-coroutines-core](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-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

build.gradle.kts

@@ -48,7 +48,7 @@ dependencies {
     implementation("plus.sourceplus:protocol:$projectVersion")
 
     implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.3.3")
-    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.3")
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.4")
     implementation("org.slf4j:slf4j-api:$slf4jVersion")
     implementation("org.slf4j:slf4j-nop:$slf4jVersion")
     implementation("io.vertx:vertx-core:$vertxVersion")