feat(deps): Update JS SDK to 5.21.4

[AbhiPrasad]

CHANGELOG: https://github.com/getsentry/sentry-javascript/blob/master/CHANGELOG.md#5213

Fixes JAVASCRIPT-22P1

[github-actions]

size-limit report

Path	Size
public/app.js	207.84 KB (+0.1% 🔺)
public/vendor.js	442.2 KB (+0.14% 🔺)

[dashed]

@AbhiPrasad this isn't compiling because of the incompatible types for history v3:

https://github.com/DefinitelyTyped/DefinitelyTyped/blob/d9ed79665140be79df1b982a9e4c90c153b1222e/types/history/v3/index.d.ts#L14-L28

I've previously made changes to this type to be able to import the ts definitions into this repo: DefinitelyTyped/DefinitelyTyped#37657

I'm wondering if we can make use of generics to infer the type?

[dashed]

@AbhiPrasad let's mark this as any to unblock the merge. I can take look at this later.

[AbhiPrasad]

Switched to any type. We ended up having to cut another release because stale build files got uploaded 😅