added an example so pub doesn't punish us

loosen dep

changelog

readying 2.0.0 release

fix issue with breaking change on Flutter master

1.1.3. Drops min sdk version for older Flutter installs

Dart 2 migration + Build prep (theyakka#6)

* fix dart/pub analyzer issues. update build docs.
* docs updates

bump version

add workspace for vscode. Modify example to use library instead of di…

…rectly linking