Update to latest webpack 5 and webpack-sources

[ijjk]

Updates to latest webpack versions

Bug

• Related issues linked using fixes #number
• Integration tests added

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.

Documentation / Examples

• Make sure the linting passes

[ijjk]

Stats from current PR

Default Server Mode (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
buildDuration	13.6s	13.4s	-240ms
buildDurationCached	3.8s	3.8s	-4ms
nodeModulesSize	46.7 MB	46.7 MB	⚠️ +9.69 kB

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.402	2.353	-0.05
/ avg req/sec	1040.84	1062.32	+21.48
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.219	1.26	⚠️ +0.04
/error-in-render avg req/sec	2050.38	1984.33	⚠️ -66.05

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
framework-HASH.js gzip	39.3 kB	39.3 kB	✓
main-HASH.js gzip	19.4 kB	19.4 kB	✓
webpack-HASH.js gzip	994 B	994 B	✓
Overall change	59.7 kB	59.7 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
polyfills-HASH.js gzip	31.1 kB	31.1 kB	✓
Overall change	31.1 kB	31.1 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
_app-HASH.js gzip	1.02 kB	1.02 kB	✓
_error-HASH.js gzip	3.06 kB	3.06 kB	✓
amp-HASH.js gzip	526 B	526 B	✓
css-HASH.js gzip	334 B	334 B	✓
hooks-HASH.js gzip	890 B	890 B	✓
index-HASH.js gzip	262 B	262 B	✓
link-HASH.js gzip	1.64 kB	1.64 kB	✓
routerDirect..HASH.js gzip	331 B	331 B	✓
withRouter-HASH.js gzip	329 B	329 B	✓
bb14e60e810b..30f.css gzip	125 B	125 B	✓
Overall change	8.52 kB	8.52 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
_buildManifest.js gzip	392 B	392 B	✓
Overall change	392 B	392 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
index.html gzip	562 B	562 B	✓
link.html gzip	569 B	569 B	✓
withRouter.html gzip	558 B	558 B	✓
Overall change	1.69 kB	1.69 kB	✓

---

Serverless Mode

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
buildDuration	15.8s	15.6s	-227ms
buildDurationCached	4.7s	4.8s	⚠️ +101ms
nodeModulesSize	46.7 MB	46.7 MB	⚠️ +9.69 kB

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
framework-HASH.js gzip	39.3 kB	39.3 kB	✓
main-HASH.js gzip	19.4 kB	19.4 kB	✓
webpack-HASH.js gzip	994 B	994 B	✓
Overall change	59.7 kB	59.7 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
polyfills-HASH.js gzip	31.1 kB	31.1 kB	✓
Overall change	31.1 kB	31.1 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
_app-HASH.js gzip	1.02 kB	1.02 kB	✓
_error-HASH.js gzip	3.06 kB	3.06 kB	✓
amp-HASH.js gzip	526 B	526 B	✓
css-HASH.js gzip	334 B	334 B	✓
hooks-HASH.js gzip	890 B	890 B	✓
index-HASH.js gzip	262 B	262 B	✓
link-HASH.js gzip	1.64 kB	1.64 kB	✓
routerDirect..HASH.js gzip	331 B	331 B	✓
withRouter-HASH.js gzip	329 B	329 B	✓
bb14e60e810b..30f.css gzip	125 B	125 B	✓
Overall change	8.52 kB	8.52 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
_buildManifest.js gzip	392 B	392 B	✓
Overall change	392 B	392 B	✓

Serverless bundles

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
_error.js	16.9 kB	16.9 kB	-2 B
404.html	2.42 kB	2.42 kB	✓
500.html	2.41 kB	2.41 kB	✓
amp.amp.html	10.8 kB	10.8 kB	✓
amp.html	1.61 kB	1.61 kB	✓
css.html	1.79 kB	1.79 kB	✓
hooks.html	1.67 kB	1.67 kB	✓
index.js	17.2 kB	17.2 kB	✓
link.js	17.4 kB	17.4 kB	⚠️ +2 B
routerDirect.js	17.4 kB	17.4 kB	✓
withRouter.js	17.4 kB	17.4 kB	✓
Overall change	107 kB	107 kB	✓

---

Webpack 4 Mode (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
buildDuration	12.4s	12.4s	⚠️ +2ms
buildDurationCached	5.4s	5.3s	-55ms
nodeModulesSize	46.7 MB	46.7 MB	⚠️ +9.69 kB

Page Load Tests Overall increase ✓

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.458	2.369	-0.09
/ avg req/sec	1017.28	1055.37	+38.09
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.26	1.234	-0.03
/error-in-render avg req/sec	1984.22	2025.63	+41.41

Client Bundles (main, webpack, commons)

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
677f882d2ed8..HASH.js gzip	13.3 kB	13.3 kB	✓
framework.HASH.js gzip	39 kB	39 kB	✓
main-HASH.js gzip	7.26 kB	7.26 kB	✓
webpack-HASH.js gzip	751 B	751 B	✓
Overall change	60.3 kB	60.3 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
polyfills-HASH.js gzip	31.3 kB	31.3 kB	✓
Overall change	31.3 kB	31.3 kB	✓

Client Pages

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
_app-HASH.js gzip	1.28 kB	1.28 kB	✓
_error-HASH.js gzip	3.74 kB	3.74 kB	✓
amp-HASH.js gzip	536 B	536 B	✓
css-HASH.js gzip	339 B	339 B	✓
hooks-HASH.js gzip	887 B	887 B	✓
index-HASH.js gzip	227 B	227 B	✓
link-HASH.js gzip	1.63 kB	1.63 kB	✓
routerDirect..HASH.js gzip	303 B	303 B	✓
withRouter-HASH.js gzip	302 B	302 B	✓
e025d2764813..52f.css gzip	125 B	125 B	✓
Overall change	9.37 kB	9.37 kB	✓

Client Build Manifests

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
_buildManifest.js gzip	420 B	420 B	✓
Overall change	420 B	420 B	✓

Rendered Page Sizes

	vercel/next.js canary	ijjk/next.js update/webpack-deps	Change
index.html gzip	612 B	612 B	✓
link.html gzip	619 B	619 B	✓
withRouter.html gzip	606 B	606 B	✓
Overall change	1.84 kB	1.84 kB	✓

Commit: c25d6bc