Upgrade dependency js

[maxlapides]

There's a new version of the js package: https://github.com/dart-lang/sdk/blob/HEAD/pkg/js/CHANGELOG.md#070

Note that there is a breaking change:

Breaking Change: Moved annotations to single location in dart:_js_annotations. This makes it easier to avoid collisions with dart:js_interop's @\JS, as you will now see a static error instead of it resolving in favor of the package definition. However, since this may result in breakages in previously working code, this is treated as a breaking change.

[JgomesAT]

we need update js from 0.6.7 to 0.7.0, we have incompatible problems with other libraries

[JgomesAT]

is not deployed the version with the JS 0.0.7??