chore: min version of Dart to 1.9.0-dev.8.0

Closes angular#681

Author: mhevery

.travis.yml

@@ -10,7 +10,8 @@ env:
   - ARCH=linux-x64
   matrix:
   - MODE=js DART_CHANNEL=stable
-  - MODE=dart DART_CHANNEL=stable
+# Dissabled until Dart v1.9 hits stable
+#  - MODE=dart DART_CHANNEL=stable
   - MODE=dart DART_CHANNEL=dev
 
 before_install:

README.md

@@ -15,7 +15,7 @@ If you don't already have `npm`, get it by installing [node.js](http://nodejs.or
 3. `npm install -g protractor` (you might need to prefix this command with `sudo`)
 4. `webdriver-manager update`
 5. If you plan to use Dart:
-  1. [Install the Dart SDK](https://www.dartlang.org/tools/sdk/) - Includes the `pub` command line tool. This repository requires `pub` in version `>=1.4.0`
+  1. [Install the Dart SDK](https://www.dartlang.org/tools/sdk/) - Includes the `pub` command line tool. This repository requires `pub` in version `>=1.9.0-dev.8.0 <2.0.0`
   2. [Add the Dart SDK's `bin` directory to your system path](https://www.dartlang.org/tools/pub/installing.html)
   3. Get the pub packages you need: `pub get`
 6. `gulp build`

pubspec.yaml

@@ -1,6 +1,6 @@
 name: angular
 environment:
-  sdk: '>=1.4.0'
+  sdk: '>=1.9.0-dev.8.0 <2.0.0'
 dependencies:
   stack_trace: '>=1.1.1 <1.2.0'