Installation with yarn 1.22.18 fails

[Turbo87]

Reproduction

rust-lang/crates.io#4801

Description

When an older yarn version is used then installation of ember-data v4.6.0 fails with:

[email protected]: The engine "yarn" is incompatible with this module. Expected version "1.22.19". Got "1.22.18"

This appears to be caused by https://github.com/emberjs/data/pull/8027/files#diff-336570c014b223552c15564402521af39202b04432d7fdc3c0081ed6d3540373R91, which introduced a very restrictive engines.yarn key in the package.json file.

[runspired]

We should remove the yarn key from the individual packages, it probably only needs to be in the root. While it's nice for folks not using Volta it's obviously bad to hoist that onto outside installs.

[ef4]

This is currently breaking in Embroider's CI if somebody wants to see the failure:

https://github.com/embroider-build/embroider/runs/7566490423?check_suite_focus=true

[runspired]

@ef4 working on removal and back port now. Was not the intention to foist a yarn version on the community 😓

[runspired]

Released as 4.6.1 and 4.7 beta 1 and 4.8 alpha 1

[Turbo87]

thank you :)