fix: callback types

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Name	Status	Preview	Comments	Updated (UTC)
intro-js	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 3, 2023 10:03pm

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Size Change: +30 B (0%)

Total Size: 35.1 kB

Filename	Size	Change
dist/intro.js	12.8 kB	+9 B (0%)
dist/intro.module.js	9.51 kB	+12 B (0%)
dist/minified/intro.min.js	12.8 kB	+9 B (0%)

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