Update dependency postcss-load-config to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-load-config	^5.1.0 -> ^6.0.0
postcss-load-config	^5.0.0 -> ^6.0.0

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Release Notes

postcss/postcss-load-config (postcss-load-config)

v6.0.1

Compare Source

Bug Fixes

• Fixed bundlers support (#​262)

v6.0.0

Compare Source

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