Update dependency copy-webpack-plugin to v6.3.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
copy-webpack-plugin	devDependencies	minor	6.2.1 -> 6.3.0

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Release Notes

webpack-contrib/copy-webpack-plugin

### [`v6.3.0`](https://togithub.com/webpack-contrib/copy-webpack-plugin/blob/master/CHANGELOG.md#​630-httpsgithubcomwebpack-contribcopy-webpack-plugincomparev621v630-2020-11-03) [Compare Source](https://togithub.com/webpack-contrib/copy-webpack-plugin/compare/v6.2.1...v6.3.0) ##### Features - added the `sourceFilename` info (original source filename) to assets info ([#​542](https://togithub.com/webpack-contrib/copy-webpack-plugin/issues/542)) ([db2e3bf](https://togithub.com/webpack-contrib/copy-webpack-plugin/commit/db2e3bfae9322592c3a9af1e45d25df165b6b4e0)) - persistent cache between compilations (webpack@5 only) ([#​541](https://togithub.com/webpack-contrib/copy-webpack-plugin/issues/541)) ([c892451](https://togithub.com/webpack-contrib/copy-webpack-plugin/commit/c8924512a34391ce92715a2b61fc4b0b91a9e10f)) ##### [6.2.1](https://togithub.com/webpack-contrib/copy-webpack-plugin/compare/v6.2.0...v6.2.1) (2020-10-09) ##### Chore - update `schema-utils`

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