Reload config (#315)

build.gradle

@@ -1,3 +1,5 @@
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+
 import java.time.Instant
 import java.time.ZoneId
 import java.time.format.DateTimeFormatter
@@ -124,14 +126,10 @@ dependencies {
 }
 
 compileKotlin {
-    kotlinOptions {
-        jvmTarget = "20"
-    }
+    compilerOptions.jvmTarget.set(JvmTarget.JVM_20)
 }
 compileTestKotlin {
-    kotlinOptions {
-        jvmTarget = "20"
-    }
+    compilerOptions.jvmTarget.set(JvmTarget.JVM_20)
 }
 
 test {