fix(deps): update dependency url-loader to v4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
url-loader	dependencies	major	^3.0.0 -> ^4.0.0

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Release Notes

webpack-contrib/url-loader

### [`v4.1.1`](https://togithub.com/webpack-contrib/url-loader/blob/master/CHANGELOG.md#​411-httpsgithubcomwebpack-contriburl-loadercomparev410v411-2020-10-09) [Compare Source](https://togithub.com/webpack-contrib/url-loader/compare/v4.1.0...v4.1.1) ### [`v4.1.0`](https://togithub.com/webpack-contrib/url-loader/blob/master/CHANGELOG.md#​410-httpsgithubcomwebpack-contriburl-loadercomparev400v410-2020-04-08) [Compare Source](https://togithub.com/webpack-contrib/url-loader/compare/v4.0.0...v4.1.0) ##### Features - the `mimetype` option can be `Boolean` - added the `encoding` option - added the `generator` option ### [`v4.0.0`](https://togithub.com/webpack-contrib/url-loader/blob/master/CHANGELOG.md#​400-httpsgithubcomwebpack-contriburl-loadercomparev300v400-2020-03-17) [Compare Source](https://togithub.com/webpack-contrib/url-loader/compare/v3.0.0...v4.0.0) ##### ⚠ BREAKING CHANGES - **deps:** migrate on `mime-types` package, some rare types may have other mimetype ##### Bug Fixes - description on the `esModule` option ([#​204](https://togithub.com/webpack-contrib/url-loader/issues/204)) ([a2f127d](https://togithub.com/webpack-contrib/url-loader/commit/a2f127d16b88cda3c38509821a51487a89827c28)) - **deps:** migrate on `mime-types` package ([#​209](https://togithub.com/webpack-contrib/url-loader/issues/209)) ([fc8721f](https://togithub.com/webpack-contrib/url-loader/commit/fc8721f49626360dd81300085a747b3afa5acd38))

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