fix: update cache-loader to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
cache-loader	2.0.1 -> 4.1.0

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Release Notes

webpack-contrib/cache-loader

v4.1.0

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Features

• improved validation error messages (#​89) (074bcdc)

4.0.1 (2019-06-26)

Bug Fixes

• always use absolute paths after reading from cache

v4.0.1

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v4.0.0

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chore

• deps: update (#​81) (71e9e68)

BREAKING CHANGES

• deps: minimum required nodejs version is 8.9.0

3.0.1 (2019-05-13)

Bug Fixes

• watch on windows (#​74) (4bc6732)

v3.0.1

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v3.0.0

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Bug Fixes

• usage with raw loaders (#​69) (4924341)

Features

• change default cache directory (#​64) (fd1c6d7)

BREAKING CHANGES

• default cache directory is node_modules/.cache/cache-loader

2.0.1 (2019-01-04)

Bug Fixes

• generate normalized cache context relative paths (#​54) (5b37474)

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