Bump kotlinx-serialization-json-jvm from 1.2.0 to 1.2.1

Bumps [kotlinx-serialization-json-jvm](https://github.com/Kotlin/kotlinx.serialization) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/Kotlin/kotlinx.serialization/releases)
- [Changelog](https://github.com/Kotlin/kotlinx.serialization/blob/master/CHANGELOG.md)
- [Commits](Kotlin/kotlinx.serialization@v1.2.0...v1.2.1)

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

pom.xml

@@ -44,7 +44,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <kotlin.version>1.5.0</kotlin.version>
         <kotlin.compiler.incremental>true</kotlin.compiler.incremental>
-        <kotlinx.serialization.version>1.2.0</kotlinx.serialization.version>
+        <kotlinx.serialization.version>1.2.1</kotlinx.serialization.version>
         <ktlint.version>0.39.0</ktlint.version>
         <junit.version>5.7.2</junit.version>
         <guava.version>30.1.1-jre</guava.version>