chore(deps): update dependency clean-webpack-plugin to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
clean-webpack-plugin	2.0.2 -> 4.0.0

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Release Notes

johnagan/clean-webpack-plugin

v4.0.0

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Changes

• Added support for NodeJS 14
• Added support for webpack 5

Breaking changes:

• Dropped support for NodeJS 8
• Dropped support for webpack 3

v3.0.0

Compare Source

• Removed Node 6 support
• Removed webpack 2 support
• cleanOnceBeforeBuildPatterns use emit hook instead of compile
• Do not clean files if webpack errors are present during initial build
• Replaced default export with named export CleanWebpackPlugin

// es modules
import { CleanWebpackPlugin } from 'clean-webpack-plugin';

// common js
const { CleanWebpackPlugin } = require('clean-webpack-plugin');

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Configuration

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[svedova]

@eldemcan this needs a refactoring I guess, I'll leave this open.

[svedova]

Breaking change