fix(utils): add watch options for notify-in-sync

[dai-shi]

During investigating #284, I just noticed watch doesn't have a sync option.
Although we don't know any use cases, this PR adds it for the future use.

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[github-actions]

Size Change: +3 B (0%)

Total Size: 13.9 kB

Filename	Size	Change
dist/esm/utils.js	2.86 kB	+1 B (0%)
dist/utils.js	3.2 kB	+2 B (0%)

ℹ️ View Unchanged

Filename	Size
dist/esm/index.js	1.33 kB
dist/esm/macro.js	613 B
dist/esm/vanilla.js	1.73 kB
dist/index.js	1.43 kB
dist/macro.js	916 B
dist/vanilla.js	1.85 kB

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