Mention required dependencies in Flutter test docs

[zoechi]

Steps to Reproduce

https://flutter.io/testing/ doesn't mention these dependencies are required

dev_dependencies:
  test: '>=0.12.17 <0.13.0'
  flutter_test:
    sdk: flutter

Consider adding it to the default pubspec.yaml created by flutter create

See also http://stackoverflow.com/questions/40969166/flutter-unit-test-failed

[eseidelGoogle]

https://github.com/flutter/website/blob/master/testing.md is the docs and https://github.com/flutter/flutter/blob/master/packages/flutter_tools/templates/create/pubspec.yaml.tmpl is the template. Fixing the docs is probably best. FYI @sethladd

[sethladd]

Patches definitely welcome. Thanks for pointing this out!

[zoechi]

Consider adding it to the default pubspec.yaml created by flutter create

This was done.
I guess it's fine to close now.

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.