Update dependency io.mockk:mockk to v1.13.9 (#807)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -42,7 +42,7 @@ detekt-formatting = { module = "io.gitlab.arturbosch.detekt:detekt-formatting",
 
 # test
 junit-params = { module = "org.junit.jupiter:junit-jupiter-params", version = "5.10.1"}
-mockk = { module = "io.mockk:mockk", version = "1.13.8"}
+mockk = { module = "io.mockk:mockk", version = "1.13.9"}
 
 # this is necessary for the plugins to be used in the buildSrc folder
 kotlin-gradle = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin", version.ref = "kotlin" }