Update dependency webpack to v4.39.3

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
webpack	devDependencies	patch	4.39.2 -> 4.39.3

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Release Notes

webpack/webpack

### [`v4.39.3`](https://togithub.com/webpack/webpack/releases/v4.39.3) [Compare Source](https://togithub.com/webpack/webpack/compare/v4.39.2...v4.39.3) ### Bugfixes - fix a missing module in chunk caused by incorrect chunk graph generation of async chunks

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