Change Token.TokenType visibility to public

This type was exposed through public methods, so it shouldn't be
package-private.

Author: cirras

delphi-frontend/src/main/java/au/com/integradev/delphi/preprocessor/directive/expression/Token.java

@@ -19,7 +19,7 @@
 package au.com.integradev.delphi.preprocessor.directive.expression;
 
 public class Token {
-  enum TokenType {
+  public enum TokenType {
     UNKNOWN,
     INTEGER,
     REAL,