Update CreateWindowsExe launch4j version

Fixes #108

Author: mica-alex

src/main/java/io/github/fvarrui/javapackager/maven/CreateWindowsExe.java

@@ -113,7 +113,7 @@ protected File doApply(Packager packager) {
 					plugin(
 							groupId("com.akathist.maven.plugins.launch4j"), 
 							artifactId("launch4j-maven-plugin"),
-							version("1.7.25")
+							version("2.1.1")
 					),
 					goal("launch4j"),
 					configuration(pluginConfig.toArray(new Element[pluginConfig.size()])),