Update dependency eslint-webpack-plugin to v4

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
eslint-webpack-plugin	3.2.0 -> 4.0.1

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Release Notes

webpack-contrib/eslint-webpack-plugin

v4.0.1

Compare Source

v4.0.0

Compare Source

⚠ BREAKING CHANGES

• drop node v12 and eslint v7 (#​159)

Bug Fixes

• lint modules that are cached with webpack's filesystem cache (#​197) (92f25ec), closes #​130

• drop node v12 and eslint v7 (#​159) (1edd3c1)

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