Error when trying to use custom configuration

[csarmiento]

When trying to use a custom configuration like the one in the README (with some changes to avoid compile errors):

semver {
    tagPrefix("")
    versionModifier { nextMinor() }
    versionCalculatorStrategy(
        listOf(
            BranchMatchingConfiguration(
                """^main$""".toRegex(),
                GitRef.Branch.MAIN,
                { PreReleaseLabel("") to BuildMetadataLabel("") },
                { nextMinor() })
        )
    )
}
version = semver.version

The gradle build fails with:

FAILURE: Build failed with an exception.

* Where:
Build file '/test-project/build.gradle.kts' line: 67

* What went wrong:
Could not isolate value com.figure.gradle.semver.internal.valuesources.GitCalculateSemverValueSource$Params_Decorated@5d4dbefd of type GitCalculateSemverValueSource.Params
> Could not serialize value of type BranchMatchingConfiguration

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.

Deprecated Gradle features were used in this build, making it incompatible with Gradle 9.0.

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

For more on this, please refer to https://docs.gradle.org/8.5/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.

BUILD FAILED in 349ms

I am not versed in Kotlin, and every tip of help will be appreciated.