chore(release): update package.json and changelog to alpha.50

CHANGELOG.md

@@ -1,3 +1,18 @@
+<a name="2.0.0-alpha.50"></a>
+# 2.0.0-alpha.50 (2015-12-09)
+
+
+### Bug Fixes
+
+* **http:** fix syntax error in package.json ([869a392](https://github.com/angular/angular/commit/869a3923574de9ed34b953e84e1744cc007ca629)), closes [#5636](https://github.com/angular/angular/issues/5636) [#5726](https://github.com/angular/angular/issues/5726)
+* **http:** use `any` for res.json() return ([cbf7888](https://github.com/angular/angular/commit/cbf7888)), closes [#5636](https://github.com/angular/angular/issues/5636) [#5646](https://github.com/angular/angular/issues/5646)
+* **testing:** remove Symbol dummy shim ([c1ae49d](https://github.com/angular/angular/commit/c1ae49d)), closes [#5067](https://github.com/angular/angular/issues/5067) [#5719](https://github.com/angular/angular/issues/5719)
+* **package:** update RxJS to alpha.14 ([4432cf5](https://github.com/angular/angular/commit/4432cf5438b8c615d297e8965f0ad69f0188169e)), closes [#5722](https://github.com/angular/angular/issues/5722)
+
+### Features
+
+* **testing:** package angular2_testing to prepare it for publishing ([cc8f1f9](https://github.com/angular/angular/commit/cc8f1f9)), closes [#5682](https://github.com/angular/angular/issues/5682)
+
 <a name="2.0.0-alpha.49"></a>
 # 2.0.0-alpha.49 (2015-12-09)
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "angular-srcs",
-  "version": "2.0.0-alpha.49",
+  "version": "2.0.0-alpha.50",
   "branchPattern": "2.0.*",
   "description": "Angular 2 - a web framework for modern web apps",
   "homepage": "https://github.com/angular/angular",