fix(deps): update dependency webpack to v4.23.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
webpack	dependencies	minor	4.22.0 -> 4.23.1	source

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Release Notes

webpack/webpack

### [`v4.23.1`](https://renovatebot.com/gh/webpack/webpack/releases/v4.23.1) [Compare Source](https://renovatebot.com/gh/webpack/webpack/compare/v4.23.0...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`](https://renovatebot.com/gh/webpack/webpack/releases/v4.23.0) [Compare Source](https://renovatebot.com/gh/webpack/webpack/compare/v4.22.0...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

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