[v2] breaking: require react 18 and drop use-sync-external-store

[dai-shi]

For #810

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Name	Status	Preview	Comments	Updated (UTC)
valtio	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 13, 2023 1:06pm

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React Browserify	Configuration
React Snowpack	Configuration
React Parcel	Configuration

[github-actions]

Size Change: -168 B (0%)

Total Size: 42.4 kB

Filename	Size	Change
dist/react.js	626 B	-31 B (-5%)	✅
dist/system/react.development.js	815 B	-36 B (-4%)
dist/system/react.production.js	426 B	-33 B (-7%)	✅
dist/umd/react.development.js	763 B	-38 B (-5%)	✅
dist/umd/react.production.js	490 B	-30 B (-6%)	✅

ℹ️ View Unchanged

Filename	Size
dist/index.js	243 B
dist/macro.js	919 B
dist/macro/vite.js	1.08 kB
dist/react/utils.js	244 B
dist/system/index.development.js	236 B
dist/system/index.production.js	170 B
dist/system/macro.development.js	779 B
dist/system/macro.production.js	556 B
dist/system/macro/vite.development.js	951 B
dist/system/macro/vite.production.js	660 B
dist/system/react/utils.development.js	321 B
dist/system/react/utils.production.js	223 B
dist/system/utils.development.js	241 B
dist/system/utils.production.js	176 B
dist/system/vanilla.development.js	2.46 kB
dist/system/vanilla.production.js	1.42 kB
dist/system/vanilla/utils.development.js	3.32 kB
dist/system/vanilla/utils.production.js	2.2 kB
dist/umd/index.development.js	382 B
dist/umd/index.production.js	330 B
dist/umd/macro.development.js	1.03 kB
dist/umd/macro.production.js	721 B
dist/umd/macro/vite.development.js	1.23 kB
dist/umd/macro/vite.production.js	879 B
dist/umd/react/utils.development.js	400 B
dist/umd/react/utils.production.js	299 B
dist/umd/utils.development.js	398 B
dist/umd/utils.production.js	344 B
dist/umd/vanilla.development.js	2.62 kB
dist/umd/vanilla.production.js	1.53 kB
dist/umd/vanilla/utils.development.js	3.91 kB
dist/umd/vanilla/utils.production.js	2.48 kB
dist/utils.js	247 B
dist/vanilla.js	2.5 kB
dist/vanilla/utils.js	3.75 kB

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