Bump jvm from 1.6.10 to 1.6.20

Bumps jvm from 1.6.10 to 1.6.20.

---
updated-dependencies:
- dependency-name: jvm
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle.kts

@@ -1,7 +1,7 @@
 import com.github.benmanes.gradle.versions.updates.DependencyUpdatesTask
 
 plugins {
-    kotlin("jvm") version "1.6.10"
+    kotlin("jvm") version "1.6.20"
     id("com.diffplug.spotless") version "6.3.0"
     id("io.gitlab.arturbosch.detekt") version "1.19.0"
     id("com.github.ben-manes.versions") version "0.42.0"