Bump kotlin.version from 1.6.20 to 1.6.21

Bumps `kotlin.version` from 1.6.20 to 1.6.21.

Updates `kotlin-stdlib-jdk8` from 1.6.20 to 1.6.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

Updates `kotlin-reflect` from 1.6.20 to 1.6.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

Updates `kotlin-test-junit` from 1.6.20 to 1.6.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

Updates `kotlin-maven-plugin` from 1.6.20 to 1.6.21

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib-jdk8
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-reflect
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-test-junit
  dependency-type: direct:development
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin:kotlin-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -4,20 +4,20 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>no.nav</groupId>
     <artifactId>kafka-embedded-env</artifactId>
-    <version>2.8.1-SNAPSHOT</version>
+    <version>3.1.0-SNAPSHOT</version>
     <name>kafka-embedded-env</name>
     <description>Simple API for running a Kafka/Confluent environment locally</description>
     <url>https://github.com/navikt/kafka-embedded-env</url>
 
     <properties>
-        <kotlin.version>1.6.0</kotlin.version>
-        <kafka.version>2.8.1</kafka.version>
-        <ktor.version>1.6.5</ktor.version>
-        <confluent.version>6.2.1</confluent.version>
+        <kotlin.version>1.6.21</kotlin.version>
+        <kafka.version>3.1.0</kafka.version>
+        <ktor.version>1.6.8</ktor.version>
+        <confluent.version>7.1.0</confluent.version>
         <spek.version>2.0.17</spek.version>
         <kluent.version>1.68</kluent.version>
-        <logback.version>1.2.7</logback.version>
-        <slf4j.version>1.7.32</slf4j.version>
+        <logback.version>1.2.11</logback.version>
+        <slf4j.version>1.7.33</slf4j.version>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>