Update dependency webpack-cli to v4.9.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
webpack-cli	4.8.0 -> 4.9.1

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Release Notes

webpack/webpack-cli

### [`v4.9.1`](https://togithub.com/webpack/webpack-cli/blob/master/CHANGELOG.md#​491-httpsgithubcomwebpackwebpack-clicomparewebpack-cli490webpack-cli491-2021-10-18) [Compare Source](https://togithub.com/webpack/webpack-cli/compare/webpack-cli@4.9.0...webpack-cli@4.9.1) ##### Bug Fixes - compatibility with dynamic `import` ([#​3006](https://togithub.com/webpack/webpack-cli/issues/3006)) ([6a9aac9](https://togithub.com/webpack/webpack-cli/commit/6a9aac99665f0d2f2f0c58c757c6befbc7734c8f)) ### [`v4.9.0`](https://togithub.com/webpack/webpack-cli/blob/master/CHANGELOG.md#​490-httpsgithubcomwebpackwebpack-clicomparewebpack-cli480webpack-cli490-2021-10-06) [Compare Source](https://togithub.com/webpack/webpack-cli/compare/webpack-cli@4.8.0...webpack-cli@4.9.0) ##### Bug Fixes - handle `undefined` and empty configuration export ([#​2930](https://togithub.com/webpack/webpack-cli/issues/2930)) ([9b9040e](https://togithub.com/webpack/webpack-cli/commit/9b9040e97c1d7a68d0757c05a67fb0fc8184b827)) ##### Features - allow to run commands without webpack installation where it is unnecessary ([#​2907](https://togithub.com/webpack/webpack-cli/issues/2907)) ([603041d](https://togithub.com/webpack/webpack-cli/commit/603041d7e6a9b764bd79d1a8effd22a3e0f019cb))

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