Add missing switch defaults

The following sonarcloud issues have been resolved:

https://sonarcloud.io/project/issues?id=jsonurl_jsonurl-java&issues=AXFhj044RhxtzbnQIFB9&open=AXFhj044RhxtzbnQIFB9

https://sonarcloud.io/project/issues?id=jsonurl_jsonurl-java&issues=AXFhj044RhxtzbnQIFB-&open=AXFhj044RhxtzbnQIFB-

Author: dmaccormack

module/jsonurl-core/src/main/java/org/jsonurl/Parser.java

@@ -416,6 +416,8 @@ private V parse(CharSequence s, int off, int length, Class<?> clazz) {
                     stateStack.pop();
                     pos++;
                     continue;
+                default:
+                    break;
                 }
                 throw new SyntaxException(ERR_MSG_EXPECT_STRUCTCHAR, pos);
 
@@ -473,6 +475,8 @@ private V parse(CharSequence s, int off, int length, Class<?> clazz) {
                     stateStack.pop();
                     pos++;
                     continue;
+                default:
+                    break;
                 }
                 throw new SyntaxException(ERR_MSG_EXPECT_STRUCTCHAR, pos);