updated to Gradle 4.9

build.gradle

 import org.apache.tools.ant.filters.ReplaceTokens
 
+plugins {
+    id 'java'
+    id 'application'
+}
+
 group 'org.citygml4j'
 version '2.7.0'
 
-apply plugin: 'java'
-apply plugin: 'application'
-
 sourceCompatibility = 1.8
 mainClassName = 'org.citygml4j.ade_xjc.ADESchemaCompiler'
 
 repositories {
-    mavenCentral()
+    jcenter()
 }
 
 ext {
@@ -66,7 +68,3 @@ distributions.main.contents {
         from 'LICENSE'
     }
 }
\ No newline at end of file
-
-task wrapper(type: Wrapper) {
-    gradleVersion = '4.5.1'
-}
\ No newline at end of file

gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.5.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.9-bin.zip