Bump kotlin.version from 1.5.10 to 1.5.20

Bumps `kotlin.version` from 1.5.10 to 1.5.20.

Updates `kotlin-stdlib-jdk8` from 1.5.10 to 1.5.20
- [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 1.5.10 to 1.5.20

---
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-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -65,7 +65,7 @@
 
     <module.name>org.mybatis.dynamic.sql</module.name>
 
-    <kotlin.version>1.5.10</kotlin.version>
+    <kotlin.version>1.5.20</kotlin.version>
     <kotlin.compiler.jvmTarget>1.8</kotlin.compiler.jvmTarget>
 
     <sonar.sources>pom.xml,src/main/java,src/main/kotlin</sonar.sources>