Bump webpack from 2.7.0 to 4.8.3

[dependabot-preview]

Bumps webpack from 2.7.0 to 4.8.3.

Release notes

Sourced from webpack's releases.

v4.8.3

Bugfixes

• fix missing debug dependency
• support arrays in output.library.root

v4.8.2

Bugfixes

• WASM parser bugfixes
• fix edge case when replacing top-level this in IIFE
• avoid parser wasm many times

v4.8.1

Bugfixes

• fix some WASM parsing issues

v4.8.0

Features

• new WASM pipeline
  • use instantiateStreaming when available
  • allow circular dependencies between wasm modules (functions only)

Bugfixes

• fix a bug where runtime code for wasm was incorrectly cached
• fix a bug where a splitChunks cacheGroup without name wasn't executed

v4.7.0

Features

• add webpackIgnore magic comment (import(/* webpackIgnore: true */ "...")) to keep the import in the bundle
• add chunkGroups to Stats
  • chunkGroups option
  • namedChunkGroups property
  • Chunk Group text output

Bugfixes

• prevent chunk merging for the runtimeChunk
• fix a caching issue for concatenated modules
• namedModules now handle name conflicts correctly
• fix a crash when using [contenthash:n] without on-demand-chunks

Internal changes

• testing uses Jest now
• testing in node.js 10 too

... (truncated)

Commits

• 9a72294 4.8.3
• de27f03 Merge pull request #7282 from xtuc/chore-bump-webassemblyjs5
• 51073cd chore: bump webassemblyjs
• d5a648b Merge pull request #7184 from byzyk/fix/allow-array-in-lib-root
• 9337295 Merge pull request #7280 from webpack/feature/update-ts-nightly-dep
• e312d62 Merge pull request #7241 from lencioni/test-docs
• ea7d08c Merge pull request #7277 from webpack/lint/cache
• 81de2d4 chore(deps): upgrade typescript nightly
• c92eabd 4.8.2
• 8d2f421 Merge pull request #7254 from xtuc/feat-remove-extra-wasm-decodings
• Additional commits viewable in compare view

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