Blueprint for typescript should use ember stable types

[lukemelia]

Currently using old @types/ packages

[lukemelia]

This may be complicated by the status of ember-cli's new app blueprint, which is used to generate the test-app. The approach to importing ember types need to be consistent.

[ef4]

Possible prerequisite: emberjs/rfcs#952 (comment)

[NullVoxPopuli]

I think we're blocked on ember-data not being compatible with the stable types.

Everyone is free to delete all the @types/ packages in favor of the stable built in types if they aren't using ember-data though.

Once ember-data is compatible with the ember stable types, the ember-cli blueprints will use those, and then we also use them.

See also:

• Use built in types from ember-source instead of the types-packages #118

[NullVoxPopuli]

Done in: #308