Bump dependency versions (#39)

Author: nshahan

pubspec.lock

@@ -12,19 +12,19 @@ packages:
       name: angular
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.0.0-alpha+3"
+    version: "4.0.0-beta"
   angular_compiler:
     description:
       name: angular_compiler
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.1"
+    version: "0.3.0"
   angular_components:
     description:
       name: angular_components
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.6.0-alpha+3"
+    version: "0.6.0-beta"
   angular_forms:
     description:
       name: angular_forms

pubspec.yaml

@@ -3,8 +3,8 @@ description: An example app using the angular_components package.
 environment:
   sdk: '>=1.24.0 <2.0.0-dev.infinity'
 dependencies:
-  angular: 4.0.0-alpha+3
-  angular_components: 0.6.0-alpha+3
+  angular: 4.0.0-beta
+  angular_components: 0.6.0-beta
   browser: ^0.10.0
   dart_to_js_script_rewriter: ^1.0.1
 dev_dependencies: