Fix visibility of the constructor of the abstract classes

Author: orangain

src/main/java/io/github/orangain/jsonmatch/pattern/ArrayPatternNode.java

@@ -15,7 +15,7 @@ public abstract class ArrayPatternNode extends JsonPatternNode {
      * Constructor of the JSON array pattern node.
      * @param expected The string representation of the expected JSON array pattern.
      */
-    public ArrayPatternNode(@NotNull String expected) {
+    protected ArrayPatternNode(@NotNull String expected) {
         super(expected);
     }
 

src/main/java/io/github/orangain/jsonmatch/pattern/JsonPatternNode.java

@@ -20,7 +20,7 @@ public abstract class JsonPatternNode {
      * Constructor of the JSON pattern node.
      * @param expected The string representation of the expected JSON pattern.
      */
-    public JsonPatternNode(@NotNull String expected) {
+    protected JsonPatternNode(@NotNull String expected) {
         this.expected = expected;
     }
 

src/main/java/io/github/orangain/jsonmatch/pattern/ObjectPatternNode.java

@@ -10,7 +10,7 @@ public abstract class ObjectPatternNode extends JsonPatternNode {
      * Constructor of the JSON object pattern node.
      * @param expected The string representation of the expected JSON object pattern.
      */
-    public ObjectPatternNode(@NotNull String expected) {
+    protected ObjectPatternNode(@NotNull String expected) {
         super(expected);
     }
 }

src/main/java/io/github/orangain/jsonmatch/pattern/ValuePatternNode.java

@@ -10,7 +10,7 @@ public abstract class ValuePatternNode extends JsonPatternNode {
      * Constructor of the JSON simple pattern node.
      * @param expected The string representation of the expected JSON simple pattern.
      */
-    public ValuePatternNode(@NotNull String expected) {
+    protected ValuePatternNode(@NotNull String expected) {
         super(expected);
     }
 }