refactor(types): prefer interfaces

[dai-shi]

following pmndrs/jotai#1234

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valtio	✅ Ready (Inspect)	Visit Preview	Jun 16, 2022 at 9:17AM (UTC)

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Size Change: 0 B

Total Size: 48.1 kB

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Filename	Size
dist/esm/index.js	712 B
dist/esm/macro.js	613 B
dist/esm/macro/vite.js	697 B
dist/esm/utils.js	3.92 kB
dist/esm/vanilla.js	1.9 kB
dist/index.js	880 B
dist/macro.js	910 B
dist/macro/vite.js	982 B
dist/system/index.development.js	871 B
dist/system/index.production.js	507 B
dist/system/macro.development.js	721 B
dist/system/macro.production.js	555 B
dist/system/macro/vite.development.js	828 B
dist/system/macro/vite.production.js	653 B
dist/system/utils.development.js	4.12 kB
dist/system/utils.production.js	2.79 kB
dist/system/vanilla.development.js	2 kB
dist/system/vanilla.production.js	1.25 kB
dist/umd/index.development.js	1 kB
dist/umd/index.production.js	670 B
dist/umd/macro.development.js	1.06 kB
dist/umd/macro.production.js	766 B
dist/umd/macro/vite.development.js	1.15 kB
dist/umd/macro/vite.production.js	874 B
dist/umd/utils.development.js	4.7 kB
dist/umd/utils.production.js	2.99 kB
dist/umd/vanilla.development.js	2.11 kB
dist/umd/vanilla.production.js	1.32 kB
dist/utils.js	4.55 kB
dist/vanilla.js	2.01 kB

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