fix(deps): update kotlin monorepo to v1.9.21

Author: renovate[bot]

semanticdb-kotlinc/build.gradle.kts

@@ -37,13 +37,13 @@ dependencies {
     testImplementation("io.kotest", "kotest-assertions-core", "4.6.3")
     testImplementation("com.github.tschuchortdev", "kotlin-compile-testing", "1.5.0")
     testImplementation("org.junit.jupiter", "junit-jupiter-params", "5.8.1")
-    testImplementation("org.jetbrains.kotlin", "kotlin-stdlib-jdk8", "1.5.0") {
+    testImplementation("org.jetbrains.kotlin", "kotlin-stdlib-jdk8", "1.9.21") {
         version {
             strictly("1.5.0")
         }
     }.because("transitive dependencies introduce 1.4.31 to the classpath which conflicts, can't use testRuntimeOnly")
     testImplementation(kotlin("reflect"))
-    testImplementation(kotlin("script-runtime", "1.5.0"))
+    testImplementation(kotlin("script-runtime", "1.9.21"))
 
     snapshotsImplementation("com.sourcegraph", "scip-java_2.13", "0.8.24")
 }