Fix dependencies to make everything work again.

pubspec.yaml

 name: web_components
 author: "Dart Team <misc@dartlang.org>"
 homepage: https://github.com/dart-lang/dart-web-components
 description: An easy way to build web apps in Dart.
-version: 0.2.7
+version: 0.2.8+2
 dependencies:
-  unittest: { sdk: unittest }
-  args: { sdk: args }
-  logging: { sdk: logging }
-  html5lib: ">=0.2.1 <0.2.2"
-  # JS interop is used by the Dartium extension. No version constraint
-  # because otherwise it makes it hard to use web_components with JS.
-  # If you're rebuilding the extension, be sure to update it for the new JS
-  # interop.
+  args: any
+  # Pin html5lib so we don't get unexpected API breaks.
+  html5lib: ">=0.2.1+1 <0.2.2"
   js: any
+  logging: any
+  unittest: any