Prep for external sync to github.

Expand dependency on observable and quiver so the external package resolve dependencies on the latest SDK.
Update CHANGELOG and README.

PiperOrigin-RevId: 185437723

Author: nshahan

CHANGELOG.md

@@ -1,3 +1,18 @@
+## 0.9.0-alpha+5
+
+> NOTE: This code is considered production quality, but depends on angular:
+> 5.0.0-alpha+5. The alpha tag represents the evolving nature of the AngularDart
+> api, not code quality (5.0.0-alpha+5 is used in production Google apps).
+
+ * Material Menu: Add a feature to menu item group to make it expandable.
+ * Material Radio: Protect against the group being destroyed before the
+   `tabIndex` gets reset.
+ * Material Tooltip: Update line height to 20px per ACUX spec.
+ * Widen dependencies on observable and quiver.
+ * Turn overlayRepositionLoop on by default.
+ * Only add touch listeners if the primary input is touch.
+ * Cleanup type warnings and other Dart 2 fixes.
+
 ## 0.9.0-alpha+4
 
 > NOTE: This code is considered production quality, but depends on angular:

README.md

@@ -114,4 +114,4 @@ imports in your Sass files.
 ## Project Roadmap
 
 Our current work is summarized in the
-[roadmap for this quarter](https://github.com/dart-lang/angular_components/issues/193).
+[roadmap for this quarter](https://github.com/dart-lang/angular_components/issues/221).

pubspec.yaml

@@ -1,5 +1,5 @@
 name: angular_components
-version: 0.9.0-alpha+4
+version: 0.9.0-alpha+5
 description: >
   The official Material Design components for AngularDart. Used at Google
   in production apps.
@@ -19,8 +19,8 @@ dependencies:
   js: ^0.6.1
   logging: ^0.11.2
   meta: ^1.0.4
-  observable: '>=0.17.0+1 <0.21.0'
+  observable: '>=0.17.0+1 <0.22.0'
   perf_api: ^0.1.0
-  quiver: '>=0.24.0 <0.28.0'
+  quiver: '>=0.24.0 <0.29.0'
   sass_builder: ^1.1.2
   uuid: ^0.5.3