update(angular-universal-ssr): updating angular version from 10 to 15

[ViniChab]

Updating Angular version 10 to 15 for the angular-universal-ssr example;
Both the host and client apps have been updated;

[CLAassistant]

All committers have signed the CLA.

[vercel]

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Name	Status	Preview	Comments	Updated
medusa-example-dsl	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Feb 7, 2023 at 0:45AM (UTC)
medusa-example-home	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Feb 7, 2023 at 0:45AM (UTC)
medusa-example-nav	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Feb 7, 2023 at 0:45AM (UTC)
medusa-example-search	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Feb 7, 2023 at 0:45AM (UTC)
medusa-example-utils	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Feb 7, 2023 at 0:45AM (UTC)

[ViniChab]

A little update on this, since I'm leaving:

The packages have been updated, and have the correct versions. With that being said, there's an error popping up when trying to run yarn start. I've tried my best, but couldn't figure it out:

The error states that it can't resolve some files, but they are indeed there and correctly imported.

Maybe someone with better knowledge of MF can do it. If not, we could try to create another example from scratch.