Bump mockk_version from 1.12.3 to 1.13.9

Bumps `mockk_version` from 1.12.3 to 1.13.9.

Updates `io.mockk:mockk` from 1.12.3 to 1.13.9
- [Release notes](https://github.com/mockk/mockk/releases)
- [Commits](mockk/mockk@1.12.3...1.13.9)

Updates `io.mockk:mockk-agent-jvm` from 1.12.3 to 1.13.9
- [Release notes](https://github.com/mockk/mockk/releases)
- [Commits](mockk/mockk@1.12.3...1.13.9)

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

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

build.gradle

@@ -35,7 +35,7 @@ buildscript {
         acra_version = "5.9.3"
         fastadapter_version = "5.6.0"
         junit_jupiter_version = "5.10.1"
-        mockk_version = "1.12.3"
+        mockk_version = "1.13.9"
         junit_ext_version = "1.1.3"
         test_rule_version = "1.5.0"
         espresso_core_version = "3.5.1"