partially migrate to webpack 5 types

[sokra]

fix type declarations to avoid import from webpack/webpack4/webpack5 in type declarations

[styfle]

Are we still planning to support webpack 4 here?

[sokra]

It's used only in the typings, so it doesn't really matter...

[ijjk]

Stats from current PR

Default Build (Decrease detected ✓)

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
buildDuration	17.3s	17.5s	⚠️ +208ms
buildDurationCached	3.5s	3.6s	⚠️ +125ms
nodeModulesSize	196 MB	196 MB	⚠️ +600 B

Page Load Tests Overall decrease ⚠️

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.893	2.851	-0.04
/ avg req/sec	864.09	876.95	+12.86
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.373	1.4	⚠️ +0.03
/error-in-render avg req/sec	1821.38	1785.8	⚠️ -35.58

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	27.7 kB	27.7 kB	✓
webpack-HASH.js gzip	1.45 kB	1.45 kB	✓
Overall change	71.5 kB	71.5 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
polyfills-a4..dd70.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
_app-HASH.js gzip	1.23 kB	1.23 kB	✓
_error-HASH.js gzip	194 B	194 B	✓
amp-HASH.js gzip	312 B	312 B	✓
css-HASH.js gzip	327 B	327 B	✓
dynamic-HASH.js gzip	2.38 kB	2.38 kB	✓
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	635 B	635 B	✓
image-HASH.js gzip	4.44 kB	4.44 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	1.87 kB	1.87 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	✓
9a34b27eb3f9..27d.css gzip	125 B	125 B	✓
Overall change	13.2 kB	13.2 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
_buildManifest.js gzip	459 B	459 B	✓
Overall change	459 B	459 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
index.html gzip	535 B	535 B	✓
link.html gzip	547 B	547 B	✓
withRouter.html gzip	528 B	528 B	✓
Overall change	1.61 kB	1.61 kB	✓

---

Default Build with SWC (Increase detected ⚠️)

General Overall increase ⚠️

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
buildDuration	14.6s	14.7s	⚠️ +75ms
buildDurationCached	3.5s	3.6s	⚠️ +20ms
nodeModulesSize	196 MB	196 MB	⚠️ +600 B

Page Load Tests Overall increase ✓

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
/ failed reqs	0	0	✓
/ total time (seconds)	2.892	2.903	⚠️ +0.01
/ avg req/sec	864.47	861.11	⚠️ -3.36
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	1.423	1.367	-0.06
/error-in-render avg req/sec	1756.37	1829.15	+72.78

Client Bundles (main, webpack, commons)

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	27.8 kB	27.8 kB	✓
webpack-HASH.js gzip	1.43 kB	1.43 kB	✓
Overall change	71.6 kB	71.6 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
polyfills-a4..dd70.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
_app-HASH.js gzip	1.22 kB	1.22 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	2.38 kB	2.38 kB	✓
head-HASH.js gzip	342 B	342 B	✓
hooks-HASH.js gzip	621 B	621 B	✓
image-HASH.js gzip	4.46 kB	4.46 kB	✓
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	1.9 kB	1.9 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	✓
9a34b27eb3f9..27d.css gzip	125 B	125 B	✓
Overall change	13.1 kB	13.1 kB	✓

Client Build Manifests

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
_buildManifest.js gzip	459 B	459 B	✓
Overall change	459 B	459 B	✓

Rendered Page Sizes

	vercel/next.js canary	vercel/next.js type/webpack-reference	Change
index.html gzip	533 B	533 B	✓
link.html gzip	546 B	546 B	✓
withRouter.html gzip	527 B	527 B	✓
Overall change	1.61 kB	1.61 kB	✓

Commit: f49bdf1

[ijjk]

Failing test suites

Commit: f49bdf1

test/development/basic/hmr.test.ts

• basic HMR > Error Recovery > should recover after an error reported via SSR

Expand output

● basic HMR › Error Recovery › should recover after an error reported via SSR

TIMED OUT: /an-expected-error-in-gip/

null

  437 |
  438 |   if (hardError) {
> 439 |     throw new Error('TIMED OUT: ' + regex + '\n\n' + content)
      |           ^
  440 |   }
  441 |   return false
  442 | }

  at Object.check (lib/next-test-utils.js:439:11)
  at Object.<anonymous> (development/basic/hmr.test.ts:502:17)