Gradle DSL method not found: 'runProguard'

old:

buildTypes {
    release {

        runProguard false // this line has to be changed

        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }


}

new:

buildTypes {


    release {

        minifyEnabled false // new version

        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}