Update dependency source-map-loader to v4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
source-map-loader	3.0.1 -> 4.0.0

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Release Notes

webpack-contrib/source-map-loader

v4.0.0

Compare Source

⚠ BREAKING CHANGES

• minimum supported Node.js version is 14.15.0

3.0.1 (2022-01-03)

Chore

• update source-map-js

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[thornbill]

This should be dependent on #3972 since we currently use node 12.

[nielsvanvelzen]

With #3972 merged this one can be merged as well right?

[thornbill]

Yup it should be good now.