Pin mockk and Kotest to versions requiring Kotlin 1.9.x

Author: paul-griffith

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 java = "17"
 kotlin = "1.9.20"
-kotest = "5.9.1"
+kotest = "5.8.0"
 ignition = "8.3.0"
 
 [plugins]
@@ -21,7 +21,7 @@ kotest-junit = { group = "io.kotest", name = "kotest-runner-junit5", version.ref
 kotest-assertions-core = { group = "io.kotest", name = "kotest-assertions-core", version.ref = "kotest" }
 kotest-property = { group = "io.kotest", name = "kotest-property", version.ref = "kotest" }
 kotest-data = { group = "io.kotest", name = "kotest-framework-datatest", version.ref = "kotest" }
-mockk = { group = "io.mockk", name = "mockk", version = "1.14.6" }
+mockk = { group = "io.mockk", name = "mockk", version = "1.13.9" }
 
 [bundles]
 gateway = [