Add ESModule Build - Closes #58

[petermikitsh]

Summary

(If you have not already please refer to the contributing guideline as described here)

• [x] Tell us about the problem your pull request is solving. See https://github.com/feathers-plus/feathers-redux/issues/58
• [x] Are there any open issues that are related to this? See https://github.com/feathers-plus/feathers-redux/issues/58
• [x] Is this PR dependent on PRs in other repos? No.

[petermikitsh]

The build failure is unrelated to this change set.

This package depends on feathers-tests-fake-app-users, which has an integration issue with sift.js.