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>

Author: dependabot[bot]

build.gradle.kts

@@ -3,7 +3,7 @@ import java.text.SimpleDateFormat
 import java.util.*
 
 plugins {
-  kotlin("jvm") version "1.6.10"
+  kotlin("jvm") version "1.6.20"
   id("maven-publish")
   id("signing")
   id("com.github.ben-manes.versions") version "0.42.0"