Fix pubspec for angular_forms and angular_test to publish.

PiperOrigin-RevId: 181220132

fix(angular_compiler): Add dep override for angular_ast.

PiperOrigin-RevId: 179480913

Add missing LICENSE file angular_ast package.

PiperOrigin-RevId: 171731778

Prepare angular_router pubspec and changelog for 2.0.0-alpha release.

PiperOrigin-RevId: 169967848

fix(CHANGELOG): Haven't released 4.x yet.

PiperOrigin-RevId: 167025174

refactor(Compiler): Start removing `UrlResolver` from the public API.

This prepares for moving `UrlResolver` into another library.

PiperOrigin-RevId: 166373309

fix(angular_forms): Add missing dependencies for func and meta.

PiperOrigin-RevId: 165364790

Update changelog for angular_router to 1.0.0

PiperOrigin-RevId: 164479795

Add automated testing of _tests and angular_test to travis.

* Only test on Dart stable for now. Let's get this working 1st.
* Start XVFB (thanks Gary!) and download/"install" Dartium.

Misc changes necessary to land this:

* Renamed the generated files in test_files from .dart -> .check
  * Otherwise the analyzer would scream about these files locally
* Reflection remover considers "main()" to be an entry-point
  * Removes the need for explicit @AngularEntrypoint() in tests

Closes angulardart#534.

PiperOrigin-RevId: 162556261