Update changelog. Update version to 2.2.0

Author: Dan Richelson

CHANGELOG.md

@@ -2,6 +2,13 @@
 
 
 All notable changes to the LaunchDarkly Java SDK will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org).
+## [2.2.0] - 2017-04-11
+### Added
+- Authentication for proxied http requests is now supported (Basic Auth only)
+
+### Changed
+- Improved Redis connection pool management.
+
 ## [2.1.0] - 2017-03-02
 ### Added
 - LdClientInterface (and its implementation) have a new method: `boolean isFlagKnown(String featureKey)` which checks for a 

build.gradle

@@ -19,7 +19,7 @@ repositories {
 
 allprojects {
     group = 'com.launchdarkly'
-    version = "2.2.0-SNAPSHOT"
+    version = "2.2.0"
     sourceCompatibility = 1.7
     targetCompatibility = 1.7
 }