George Kalpakas 81a0e7145b ci: fix elements test on older browsers (#41324)
Some `elements` tests rely on `window.customElements` being available.
On browsers where this was not present, the tests were skipped.

This commit includes the `@webcomponents/custom-elements` polyfill in
order to be able to run all `elements` tests on older browsers, which do
not natively support Custom Elements.

This, also, fixes the [saucelabs_ivy][1] and [saucelabs_view_engine][2]
CI jobs (part of the `monitoring` workflow), which have been failing
recently on IE 11 (probably due to the update to TS 4.2.3).

[1]: https://circleci.com/gh/angular/angular/944291
[2]: https://circleci.com/gh/angular/angular/944289

PR Close #41324
2021-03-24 08:28:46 -07:00
..