Update to ember-cli@3.5.0.

[rwjblue]

Brings loads of changes/fixes, but the reason I did it was to start using Broccoli 2...

[Turbo87]

looks like some blueprint-related things are breaking 🤔

[rwjblue]

Yeah, its because the tests are setup to expect the wrong thing by default ember new foo. Its going to be a bit of a chore to fix 😩.

[rwjblue]

I pushed one commit with fixes for acceptance-test file to show what I mean.

[Turbo87]

oh... that makes sense... 😞

[ppcano]

@simonihmig Will #17207 and #17198 finally unblock the ember-cli@3.5 upgrade or there are something else that needs to be done.

I am working on the MU blueprints and I would like to test with new versions of ember-cli and ember-cli-blueprint-test-helpers.

[simonihmig]

Will #17207 and #17198 finally unblock the ember-cli@3.5 upgrade or there are something else that needs to be done.

@ppcano I guess there are a few more blueprints that need to be "fixed", which I haven't touched yet (e.g. mixins). I believe making each single test explicit about the test framework version used is the key here, as in this example: https://github.com/emberjs/ember.js/pull/17207/files#diff-b1525449225102a81123371a3a8c87f8R26

[ppcano]

#17212 supersedes this PR

[rwjblue]

Thank you @ppcano!