Prep to publish angular_components 0.14.0-alpha+1

Update dependencies and travis scripts and CHANGELOG.

PiperOrigin-RevId: 260219352

Update deps to support building with `webdev: ^2.0.6`

Prep to publish angular_components v0.14.0-alpha

* Bump minimum SDK and deps.
* Update CHANGELOG.

PiperOrigin-RevId: 250922957

Prep to publish angular_components v0.13.0

* Update CHANGELOG and bump deps.
* Add build.yaml files to examples needed to configure the updated builders.
* Additional changes to travis testing scripts.

PiperOrigin-RevId: 243687496

Prep to publish angular_components v0.12.0

- Update CHANGELOG, README, and pubspecs.

PiperOrigin-RevId: 233841395

Minor fixes to comments and READMEs before publishing angular_compone…

…nts v0.11.0

PiperOrigin-RevId: 225458510