added since annotation to Converter and Verifier

Author: Claudenw

src/main/java/org/apache/commons/cli/converters/Converter.java

@@ -26,6 +26,7 @@ Licensed to the Apache Software Foundation (ASF) under one or more
  * Like {@code Function<String,T>} but can throw an Exception.
  *
  * @param <T> The return type for the function.
+ * @since 1.7
  */
 @FunctionalInterface
 public interface Converter<T> {

src/main/java/org/apache/commons/cli/converters/Verifier.java

@@ -21,7 +21,7 @@ Licensed to the Apache Software Foundation (ASF) under one or more
 /**
  * The definition of the functional interface to call when verifying a string
  * for input Like {@code Predicate<String>} but can throw a RuntimeException.
- * 
+ * @since 1.7
  */
 @FunctionalInterface
 public interface Verifier {