Doesn't compile with Java 14

[lbalazscs]

If JAVA_HOME is set to a jDK 8, then mvn clean package builds the project fine. However with a JDK 14:

[ERROR] /C:/dev/java_apps/i18n-editor-master/src/main/java/com/jvms/i18neditor/editor/TranslationTreeNode.java:[64,40] incompatible types: inference variable T has incompatible equality constraints com.jvms.i18neditor.editor.TranslationTreeNode,javax.swing.tree.TreeNode
[ERROR] /C:/dev/java_apps/i18n-editor-master/src/main/java/com/jvms/i18neditor/editor/TranslationTreeModel.java:[34,50] incompatible types: java.util.Enumeration<javax.swing.tree.TreeNode> cannot be converted to java.util.Enumeration<com.jvms.i18neditor.editor.TranslationTreeNode>