chore(deps): update dependency eventsource to v5.1.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
eventsource	5.1.0 → 5.1.1

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Release Notes

EventSource/eventsource (eventsource)

v5.1.1

Compare Source

Patch Changes

• #​358 de3c0ae Thanks @​pacocartones! - Fixed MessageEvent.lastEventId being empty when a message omits the id field

  The lastEventId attribute is the last event ID string of the event source, so an explicit id field persists until another one replaces it. Message events were dispatched with the current event's own id instead of that buffer, which left lastEventId empty on every event that omitted id, even though the buffer still held the earlier value and would have been sent as Last-Event-ID on reconnect.

• 17a9772 Thanks @​rexxars! - Fixed ID-only event blocks not updating MessageEvent.lastEventId or Last-Event-ID on reconnect.

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[bundlemon]

BundleMon (elements)

Unchanged files (3)

Status	Path	Size	Limits
✅	index.js	250.42KB	-
✅	mutation-test-elements.js	230.02KB	-
✅	index.cjs	212.76KB	-

No change in files bundle size

Final result: ✅

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Current branch size history | Target branch size history