Use Groovy syntax for accesing a file in build.gradle

build.gradle

@@ -3,7 +3,7 @@ plugins {
 }
 
 subprojects {
-    def config = new ConfigSlurper().parse(new File("$projectDir/src/main/resources/version.properties").toURI().toURL())
+    def config = new ConfigSlurper().parse(file("$projectDir/src/main/resources/version.properties").toURI().toURL())
     group = 'co.rsk'
     version = config.modifier?.trim() ? config.versionNumber + "-" + config.modifier : config.versionNumber
 }