`ember-cli-babel` deprecations

[sumeetattree]

Running on the v1.1.7 I am encountering these 2 deprecation warnings:

DEPRECATION: ember-cli-babel 5.x has been deprecated. Please upgrade to at least ember-cli-babel 6.6. Version 5.2.8 located: client -> ember-cli-d3 -> ember-cli-babel
DEPRECATION: ember-cli-babel 5.x has been deprecated. Please upgrade to at least ember-cli-babel 6.6. Version 5.2.8 located: client -> ember-cli-d3 -> ember-getowner-polyfill -> ember-cli-babel

These warnings are also triggering:

WARNING: You have not included `ember-cli-shims` in your project's `bower.json` or `package.json`. This only works if you provide an alternative yourself and unset `app.vendorFiles['app-shims.js']`.

See this comment in this issue by @rwjblue

We discussed this at the latest ember-cli meeting, and instead of removing directly we need to modify the conditional to only warn if the app does not depend on ember-cli-shims and it has at least one addon that depends on ember-cli-babel@5.

This will remove the warning for folks that do not need it (ember-cli-babel@6.6+ does inline shim transpilation), and continue to be helpful for folks that do rely on the shims...