update release notes

Author: cowtowncoder

release-notes/CREDITS

@@ -57,4 +57,5 @@ Roland Huss (rhuss@github)
 
 - Reported #77, contributed fix: Boolean-like content of string must never be unquoted
  (2.8.4)
-
+- Contributed #76: Add `YAMLGenerator.Feature.LITERAL_BLOCK_STYLE` for String output
+ (2.9.0)

release-notes/VERSION

@@ -6,6 +6,9 @@ Project: jackson-dataformat-yaml
 
 2.9.0 (not yet released)
 
+#76: Add `YAMLGenerator.Feature.LITERAL_BLOCK_STYLE` for String output
+ (contributed by Roland H)
+
 2.8.4 (not yet released)
 
 #77: Boolean-like content of string must never be unquoted

src/main/java/com/fasterxml/jackson/dataformat/yaml/YAMLGenerator.java

@@ -99,6 +99,8 @@ public enum Feature // implements FormatFeature // for 2.7
          * <p>
          * The content of such strings is limited to printable characters according to the rules of
          * <a href="http://www.yaml.org/spec/1.2/spec.html#style/block/literal">literal block style</a>.
+         *
+         * @since 2.9
          */
         LITERAL_BLOCK_STYLE(false)
         ;