Port buildSrc/build.gradle to build.gradle.kts

Author: emlun

buildSrc/build.gradle

@@ -0,0 +1,12 @@
+plugins {
+  groovy
+}
+
+repositories {
+  mavenCentral()
+}
+
+dependencies {
+  implementation("commons-io:commons-io:2.5")
+  implementation("info.solidsoft.gradle.pitest:gradle-pitest-plugin:1.5.1")
+}