chore(deps): update dependency webpack-cli to v3.3.12

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
webpack-cli (source)	3.3.11 -> 3.3.12

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Release Notes

webpack/webpack-cli (webpack-cli)

### [`v3.3.12`](https://togithub.com/webpack/webpack-cli/blob/HEAD/CHANGELOG.md#3312-2020-06-03) [Compare Source](https://togithub.com/webpack/webpack-cli/compare/v3.3.11...v3.3.12) [Full Changelog](https://togithub.com/webpack/webpack-cli/compare/v3.3.11...v3.3.12)

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Configuration

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