feat: allow node-sass@7 as peer dependency

[balazsorban44]

Fixes #34086

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

[matamatanot]

@balazsorban44
node-sass had dropped support for Node10 since v6.
https://github.com/sass/node-sass/releases/tag/v6.0.0

sass-loader@12 's minimum supported Node.js version is 12.13.0.
https://github.com/webpack-contrib/sass-loader/releases/tag/v12.0.0

Next.js has 12.22.0.
So, I don't think 4 and 5 should be included.

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js chore/allow-node-sass-7	Change
buildDuration	15.3s	15.2s	-16ms
buildDurationCached	6.2s	6.1s	-105ms
nodeModulesSize	359 MB	359 MB	⚠️ +1.59 kB

Page Load Tests Overall increase ✓

	vercel/next.js canary	vercel/next.js chore/allow-node-sass-7	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.963	2.981	⚠️ +0.02
/ avg req/sec	843.63	838.66	⚠️ -4.97
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.196	1.184	-0.01
/error-in-render avg req/sec	2089.97	2112.03	+22.06

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js chore/allow-node-sass-7	Change
450.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	71.5 kB	71.5 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js chore/allow-node-sass-7	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/allow-node-sass-7	Change
_app-HASH.js gzip	1.36 kB	1.36 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	2.57 kB	2.57 kB	✓
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	919 B	919 B	✓
image-HASH.js gzip	5.01 kB	5.01 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	2.26 kB	2.26 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	14.7 kB	14.7 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js chore/allow-node-sass-7	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/allow-node-sass-7	Change
index.html gzip	532 B	532 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 (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js chore/allow-node-sass-7	Change
buildDuration	19s	18.6s	-339ms
buildDurationCached	6s	6s	-67ms
nodeModulesSize	359 MB	359 MB	⚠️ +1.59 kB

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	vercel/next.js chore/allow-node-sass-7	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.994	2.996	0
/ avg req/sec	834.98	834.34	⚠️ -0.64
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.179	1.209	⚠️ +0.03
/error-in-render avg req/sec	2120.87	2068.02	⚠️ -52.85

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js chore/allow-node-sass-7	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.1 kB	42.1 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	vercel/next.js chore/allow-node-sass-7	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/allow-node-sass-7	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	2.56 kB	2.56 kB	✓
head-HASH.js gzip	342 B	342 B	✓
hooks-HASH.js gzip	911 B	911 B	✓
image-HASH.js gzip	5.05 kB	5.05 kB	✓
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	2.28 kB	2.28 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	14.7 kB	14.7 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js chore/allow-node-sass-7	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/allow-node-sass-7	Change
index.html gzip	532 B	532 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	525 B	525 B	✓
Overall change	1.6 kB	1.6 kB	✓

Commit: 639347d

[ijjk]

Looks good, thanks!