chore(deps): upgrade postcss

[balazsorban44]

Fixes #33135

I also tried reducing the number of variants.

Bug

• Related issues linked using fixes #number
• Integration tests added
• Errors have helpful link attached, see contributing.md

Feature

• Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
• Related issues linked using fixes #number
• Integration tests added
• Documentation added
• Telemetry added. In case of a feature if it's used or not.
• Errors have helpful link attached, see contributing.md

Documentation / Examples

• Make sure the linting passes by running yarn lint

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall decrease ✓

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
buildDuration	14.1s	13.8s	-215ms
buildDurationCached	3.1s	3.1s	-1ms
nodeModulesSize	355 MB	354 MB	-691 kB

Page Load Tests Overall increase ✓

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.743	2.744	0
/ avg req/sec	911.34	911.03	⚠️ -0.31
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.167	1.163	0
/error-in-render avg req/sec	2141.4	2150.31	+8.91

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	27.2 kB	27.2 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	71 kB	71 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
_app-HASH.js gzip	1.37 kB	1.37 kB	✓
_error-HASH.js gzip	194 B	194 B	✓
amp-HASH.js gzip	312 B	312 B	✓
css-HASH.js gzip	326 B	326 B	✓
dynamic-HASH.js gzip	2.37 kB	2.37 kB	✓
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	919 B	919 B	✓
image-HASH.js gzip	4.7 kB	4.7 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	2.13 kB	2.13 kB	✓
routerDirect..HASH.js gzip	321 B	321 B	✓
script-HASH.js gzip	383 B	383 B	✓
withRouter-HASH.js gzip	318 B	318 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	14.1 kB	14.1 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
_buildManifest.js gzip	459 B	459 B	✓
Overall change	459 B	459 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
index.html gzip	531 B	531 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	526 B	526 B	✓
Overall change	1.6 kB	1.6 kB	✓

---

Default Build with SWC (Increase detected ⚠️)

General Overall decrease ✓

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
buildDuration	15.6s	15.4s	-177ms
buildDurationCached	3.1s	3.2s	⚠️ +43ms
nodeModulesSize	355 MB	354 MB	-691 kB

Page Load Tests Overall increase ✓

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.74	2.747	⚠️ +0.01
/ avg req/sec	912.42	910.01	⚠️ -2.41
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.14	1.135	0
/error-in-render avg req/sec	2193.38	2203.07	+9.69

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.3 kB	42.3 kB	✓
main-HASH.js gzip	27.3 kB	27.3 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	71.2 kB	71.2 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
_app-HASH.js gzip	1.35 kB	1.35 kB	✓
_error-HASH.js gzip	180 B	180 B	✓
amp-HASH.js gzip	305 B	305 B	✓
css-HASH.js gzip	321 B	321 B	✓
dynamic-HASH.js gzip	2.36 kB	2.36 kB	✓
head-HASH.js gzip	342 B	342 B	✓
hooks-HASH.js gzip	906 B	906 B	✓
image-HASH.js gzip	4.72 kB	4.72 kB	✓
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	2.19 kB	2.19 kB	✓
routerDirect..HASH.js gzip	314 B	314 B	✓
script-HASH.js gzip	375 B	375 B	✓
withRouter-HASH.js gzip	309 B	309 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	14 kB	14 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
_buildManifest.js gzip	458 B	458 B	✓
Overall change	458 B	458 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js chore/upgrade-postcss	Change
index.html gzip	530 B	530 B	✓
link.html gzip	544 B	544 B	✓
withRouter.html gzip	526 B	526 B	✓
Overall change	1.6 kB	1.6 kB	✓

Commit: 68e3b05