prepare for 2.9.1

pom.xml

diff --git a/pom.xml b/pom.xml
index ad46f6a..19cc316 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <groupId>com.fasterxml.jackson</groupId>
     <!-- this is one of few Jackson modules that depends on parent and NOT jackson-bom -->
     <artifactId>jackson-parent</artifactId>
-    <version>2.9.1-SNAPSHOT</version>
+    <version>2.9.1</version>
   </parent>
 
   <groupId>com.fasterxml.jackson.core</groupId>

release-notes/VERSION

diff --git a/release-notes/VERSION b/release-notes/VERSION
index 74e1431..c718bb1 100644
--- a/release-notes/VERSION
+++ b/release-notes/VERSION
@@ -11,7 +11,7 @@
 === Releases ===
 ------------------------------------------------------------------------
 
-2.9.1 (not released yet)
+2.9.1 (07-Sep-2017)
 
 #123: Add Automatic-Module-Name (`com.fasterxml.jackson.annotation`) for JDK9 interoperability