Merge pull request #694 from Azquelt/since-4.1

Add since tag to new methods on Extensible

Author: Azquelt

api/src/main/java/org/eclipse/microprofile/openapi/models/Extensible.java

@@ -82,6 +82,7 @@ default T extensions(Map<String, Object> extensions) {
      * @param name
      *            the key used to access the extension object. Always prefixed by "x-".
      * @return {@code true} if an extension with the given name is present, otherwise {@code false}
+     * @since 4.1
      */
     default boolean hasExtension(String name) {
         Map<String, Object> map = getExtensions();
@@ -97,6 +98,7 @@ default boolean hasExtension(String name) {
      * @param name
      *            the key used to access the extension object. Always prefixed by "x-".
      * @return the corresponding extension object, or {@code null} if no extension with the given name is present
+     * @since 4.1
      */
     default Object getExtension(String name) {
         Map<String, Object> map = getExtensions();