title: IllegalAccessException for JFXTextField with java sdk 12
body: <p>I added  JFXTextField in my javafx application but I got this error with no clue how to solve it </p>
  
  <blockquote>
    <p>class com.jfoenix.skins.JFXTextFieldSkin (in module com.jfoenix) cannot access a member of class javafx.scene.control.skin.TextFieldSkin (in module javafx.controls) with modifiers "private"</p>
  </blockquote>
  
  <p>Controller :</p>
  
  <pre><code>package sample;
  
  import com.jfoenix.controls.JFXButton;
  import com.jfoenix.controls.JFXTextField;
  import javafx.event.ActionEvent;
  import javafx.event.EventHandler;
  import javafx.fxml.FXML;
  import javafx.fxml.Initializable;
  import javafx.scene.control.Button;
  
  import java.net.URL;
  import java.util.ResourceBundle;
  
  public class Controller implements Initializable {
  
  @FXML
  private Button clickMe;
  
  
  @FXML
  private JFXButton materialButton;
  
  @FXML
  private JFXTextField textField;
  
  
  @Override
  public void initialize(URL url, ResourceBundle resourceBundle) {
  
      materialButton.setOnAction(new EventHandler&lt;ActionEvent&gt;() {
  
          @Override
          public void handle(ActionEvent actionEvent)
          {
              String text = textField.getText().trim();
              System.out.println(text);
          }
      });
  
  }
  }
  </code></pre>
  
  <p>Sample.fxml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  
  &lt;?import com.jfoenix.controls.JFXButton?&gt;
  &lt;?import com.jfoenix.controls.JFXTextField?&gt;
  &lt;?import javafx.scene.control.Button?&gt;
  &lt;?import javafx.scene.layout.AnchorPane?&gt;
  &lt;?import javafx.scene.text.Font?&gt;
  
  &lt;AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" style="-fx-background-color: #fcda;" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller"&gt;
     &lt;children&gt;
        &lt;Button fx:id="clickMe" layoutX="198.0" layoutY="188.0" mnemonicParsing="false" prefHeight="25.0" prefWidth="225.0" style="-fx-background-color: #fffe;" text="Click Me" textFill="#722929" /&gt;
        &lt;JFXButton fx:id="materialButton" layoutX="231.0" layoutY="82.0" prefHeight="54.0" prefWidth="139.0" style="-fx-background-color: #ffff;" textFill="#280c0c"&gt;
           &lt;font&gt;
              &lt;Font size="25.0" /&gt;
           &lt;/font&gt;&lt;/JFXButton&gt;
        &lt;JFXTextField fx:id="textField" layoutX="233.0" layoutY="24.0" promptText="Enter UserName" /&gt;
     &lt;/children&gt;
  &lt;/AnchorPane&gt;
  </code></pre>