Update webpack in / from 3.6.0 to 4.23.0

[ghost]

Dependencies.io has updated webpack (a npm dependency in /) from "3.6.0" to "4.23.0".

4.23.0

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