Bump webpack from 3.8.1 to 4.23.1

[dependabot-preview]

Bumps webpack from 3.8.1 to 4.23.1.

Release notes

Sourced from webpack's releases.

v4.23.1

Bugfixes

• add space when replacing expression with constant
  • i. e. for code like return'development'===process.env.NODE_ENV&&'foo'

v4.23.0

Features

• add watchMode flag to Compiler to be able to detect watch mode in plugins
• Prefer chunk names of entrypoints when merging chunks
• add removedFiles property to Compiler to detect removed files

Bugfixes

• publish declarations to npm
• upgrade @webassemblyjs/* for bugfix
• fix crash when using a side-effect-free wasm module in production mode

Internal changes

• test on node.js 12
• fix memory leak in test suite

v4.22.0

Features

• Add support for evaluating && and || expressions

Bugfixes

• fix problems where order of things where not deterministic

Performance

• improve performance of chunk graph creation
  • this will improve rebuild performance in watch mode

v4.21.0

Features

• add output.libraryTarget: "amd-require" which generates a AMD require([], ...) wrapper instead of a define([], ...) wrapper
• support arrays of strings passed to output.library, which exposes the library to a subproperty

Bugfixes

• fix cases where __webpack_require__.e is used at runtime but is not defined in the bundle
• fix behavior of externals of global type

Performance

... (truncated)

Commits

• 607cf70 4.23.1
• 5e5e7b7 Merge pull request #8270 from ljqx/logical-expression-fix
• 13d1dab [ConstPlugin] fix bug introduced by evaluation of && and ||
• a4feb6e 4.23.0
• 298fa4c Merge pull request #8266 from ljqx/wasm-finalize-exports-fix
• 035ceb6 force travis rerun
• 735b4aa Merge pull request #8182 from xtuc/ci-node-nightly
• 6844c75 add test
• 8256249 longer timeouts for Compiler test
• f7ff913 use latest node 12 nightly
• Additional commits viewable in compare view

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