Bump mockk.version from 1.12.8 to 1.13.1

Bumps `mockk.version` from 1.12.8 to 1.13.1.

Updates `mockk` from 1.12.8 to 1.13.1
- [Release notes](https://github.com/mockk/mockk/releases)
- [Commits](mockk/mockk@v1.12.8...1.13.1)

Updates `mockk-dsl-jvm` from 1.12.8 to 1.13.1
- [Release notes](https://github.com/mockk/mockk/releases)
- [Commits](mockk/mockk@v1.12.8...1.13.1)

---
updated-dependencies:
- dependency-name: io.mockk:mockk
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: io.mockk:mockk-dsl-jvm
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -67,7 +67,7 @@
     <maven-source-plugin.version>3.2.1</maven-source-plugin.version>
     <maven-surefire.version>3.0.0-M7</maven-surefire.version>
     <mockito.version>4.8.0</mockito.version>
-    <mockk.version>1.12.8</mockk.version>
+    <mockk.version>1.13.1</mockk.version>
     <nexus-staging-maven-plugin.version>1.6.13</nexus-staging-maven-plugin.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>