CDN build error for @wordpress/primitives@4.28.0

[broskees]

Reporting CDN Build Error.

.

[guybedford]

Identical to the issue in #356, and resolved via jspm/overrides@ac091c5.

Please do report further for any other cases, the root cause fix will likely take a month or so for me to get to.

[guybedford]

(override corrected in jspm/overrides@c272387)