fix inheritIo option (#488)

Author: dernasherbrezon

src/main/java/org/codehaus/mojo/exec/ExtendedExecutor.java

@@ -21,6 +21,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Path;
 import java.util.Map;
 
 import org.apache.commons.exec.CommandLine;
@@ -41,6 +42,11 @@ public ExtendedExecutor(boolean inheritIo) {
         this.inheritIo = inheritIo;
     }
 
+    @Override
+    protected Process launch(CommandLine command, Map<String, String> env, Path workingDirectory) throws IOException {
+        return this.launch(command, env, workingDirectory.toFile());
+    }
+
     @Override
     protected Process launch(CommandLine command, Map<String, String> env, File dir) throws IOException {
         if (dir != null && !dir.exists()) {