fix(types): The second parameter of EventSource is optional (#3106) #8

Job	Run time
dependency-review	0s
Lint	37s
Fuzzing	3m 32s
Test with Node.js 20 compiled --without-intl	5m 20s
Test with Node.js 21 compiled --without-intl	5m 37s
Test TypeScript types	30s
test (18, macos-latest) / Test with Node.js 18 on macos-latest	7m 14s
test (18, ubuntu-latest) / Test with Node.js 18 on ubuntu-latest	3m 42s
test (18, windows-latest) / Test with Node.js 18 on windows-latest	6m 0s
test (20, macos-latest) / Test with Node.js 20 on macos-latest	2m 36s
test (20, ubuntu-latest) / Test with Node.js 20 on ubuntu-latest	3m 33s
test (20, windows-latest) / Test with Node.js 20 on windows-latest	5m 33s
test (21, macos-latest) / Test with Node.js 21 on macos-latest	3m 1s
test (21, ubuntu-latest) / Test with Node.js 21 on ubuntu-latest	3m 25s
test (21, windows-latest) / Test with Node.js 21 on windows-latest	5m 46s
automerge	0s
	56m 26s

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