Adopt react 18 rc2

[huozhi]

Bump react 18 to rc2 for according to the streaming API changes

x-ref: reactwg/react-18#127

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall decrease ✓

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
buildDuration	19.3s	18.9s	-393ms
buildDurationCached	7.3s	7.2s	-128ms
nodeModulesSize	372 MB	372 MB	-780 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
/ failed reqs	0	0	✓
/ total time (seconds)	4.065	4.018	-0.05
/ avg req/sec	615.03	622.22	+7.19
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	2.05	2.043	-0.01
/error-in-render avg req/sec	1219.32	1223.76	+4.44

Client Bundles (main, webpack)

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
925.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42 kB	42 kB	✓
main-HASH.js gzip	27.9 kB	27.9 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	71.6 kB	71.6 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
_app-HASH.js gzip	1.36 kB	1.36 kB	✓
_error-HASH.js gzip	192 B	192 B	✓
amp-HASH.js gzip	309 B	309 B	✓
css-HASH.js gzip	327 B	327 B	✓
dynamic-HASH.js gzip	2.57 kB	2.57 kB	✓
head-HASH.js gzip	351 B	351 B	✓
hooks-HASH.js gzip	920 B	920 B	✓
image-HASH.js gzip	5.09 kB	5.09 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	2.26 kB	2.26 kB	✓
routerDirect..HASH.js gzip	320 B	320 B	✓
script-HASH.js gzip	387 B	387 B	✓
withRouter-HASH.js gzip	319 B	319 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	14.8 kB	14.8 kB	✓

Client Build Manifests

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
_buildManifest.js gzip	460 B	460 B	✓
Overall change	460 B	460 B	✓

Rendered Page Sizes

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
index.html gzip	530 B	530 B	✓
link.html gzip	544 B	544 B	✓
withRouter.html gzip	524 B	524 B	✓
Overall change	1.6 kB	1.6 kB	✓

---

Default Build with SWC (Increase detected ⚠️)

General Overall decrease ✓

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
buildDuration	23.1s	22.4s	-769ms
buildDurationCached	7.6s	7.4s	-263ms
nodeModulesSize	372 MB	372 MB	-780 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
/ failed reqs	0	0	✓
/ total time (seconds)	4.079	4.087	⚠️ +0.01
/ avg req/sec	612.88	611.71	⚠️ -1.17
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	2.079	2.032	-0.05
/error-in-render avg req/sec	1202.6	1230.05	+27.45

Client Bundles (main, webpack)

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
925.HASH.js gzip	178 B	178 B	✓
framework-HASH.js gzip	42.3 kB	42.3 kB	✓
main-HASH.js gzip	28.2 kB	28.2 kB	✓
webpack-HASH.js gzip	1.45 kB	1.45 kB	✓
Overall change	72.2 kB	72.2 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
_app-HASH.js gzip	1.35 kB	1.35 kB	✓
_error-HASH.js gzip	179 B	179 B	✓
amp-HASH.js gzip	313 B	313 B	✓
css-HASH.js gzip	324 B	324 B	✓
dynamic-HASH.js gzip	2.56 kB	2.56 kB	✓
head-HASH.js gzip	351 B	351 B	✓
hooks-HASH.js gzip	921 B	921 B	✓
image-HASH.js gzip	5.23 kB	5.23 kB	✓
index-HASH.js gzip	261 B	261 B	✓
link-HASH.js gzip	2.33 kB	2.33 kB	✓
routerDirect..HASH.js gzip	322 B	322 B	✓
script-HASH.js gzip	388 B	388 B	✓
withRouter-HASH.js gzip	317 B	317 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	15 kB	15 kB	✓

Client Build Manifests

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
_buildManifest.js gzip	459 B	459 B	✓
Overall change	459 B	459 B	✓

Rendered Page Sizes

	vercel/next.js canary	huozhi/next.js react-18-rc2	Change
index.html gzip	531 B	531 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	527 B	527 B	✓
Overall change	1.6 kB	1.6 kB	✓

Commit: 2a5a0b0