Update dependency cache-loader to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
cache-loader	1.2.5 -> 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)

v2.0.1

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Bug Fixes

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

v2.0.0

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Chores

• drop support for webpack < 4 (#​51) (2e76d3f)
• drop support for node < 6 (#​50) (b8225cd)

Features

• add cacheContext option (#​49) (22d0173)

BREAKING CHANGES

• drop support for webpack < 4
• drop support for node < 6

1.2.5 (2018-10-31)

Bug Fixes

• index: this of stat method is undefined (#​47) (5c67ccd)

1.2.4 (2018-10-31)

Bug Fixes

• index: fallback to fs if this.fs is undefined (#​45) (b84d13e)

1.2.3 (2018-10-30)

Performance Improvements

• index: use the compiler's cached fs for stats (this.fs.stat) (#​42) (d8c630b)

1.2.2 (2018-02-27)

Performance Improvements

• use neo-async instead async (#​31) (0851582)

1.2.1 (2018-02-26)

Bug Fixes

• package: add webpack >= v4.0.0 (peerDependencies) (#​32) (a5e921c)

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