Update version to 1.9.0

CHANGELOG.md

@@ -0,0 +1,6 @@
+## Releases
+--
+#### 1.9.0 (April 14, 2017)
+*  Fixed bug where calling setUserIdentity with a similar type added another identity, rather than replacing the identity.
+*  Calling setUserIdentity with `id = null` and valid type will remove the user identity of that type
+*  Include CommerceEvent custom attributions in expansion; makes a copy of the original commerce event rather than referencing it, which would mutate it

mparticle.js

@@ -20,7 +20,7 @@
     var serviceUrl = 'jssdk.mparticle.com/v1/JS/',
         secureServiceUrl = 'jssdks.mparticle.com/v1/JS/',
         serviceScheme = window.location.protocol + '//',
-        sdkVersion = '1.8.7',
+        sdkVersion = '1.9.0',
         isEnabled = true,
         pluses = /\+/g,
         sessionAttributes = {},

package.json

@@ -1,5 +1,6 @@
 {
   "name": "mparticle-sdk-javascript",
+  "version": "1.9.0",
   "description": "mParticle core Javascript SDK",
   "repository": "https://github.com/mParticle/mparticle-sdk-javascript",
   "scripts": {