Incompatibility between Kotlin 1.7.xx and mockk after updating to 1.13.8

[alsoba13]

Expected Behavior

I have a gradle project with Kotlin 1.7.22 and mockk 1.13.7.

I updated mockk to 1.13.8 and I'd have expected to still have full compatibility with my 1.7.22 kotlin project.

Current Behavior

I get this message on build:

Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.9.0, expected version is 1.7.1.

Bumping to 1.13.9 doesn't seem to fix it either

Steps to Reproduce

Please provide detailed steps for reproducing the issue.

1. clone the repo I've prepared for this issue: https://github.com/alsoba13/mockk-1.13.8-kotlin-1.7-issue
2. run the tests. Check that they work:

./gradlew test

3. bump mockk to 1.13.8 in line 15 of build.gradle
4. re-run tests to get this message:

e: [...]/kotlin-stdlib-common.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.9.0, expected version is 1.7.1.