chore(deps): update dependency postcss to v8.4.19

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss (source)	8.4.18 -> 8.4.19

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Release Notes

postcss/postcss

v8.4.19

Compare Source

• Fixed whitespace preserving after AST transformations (by Romain Menke).

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[codecov]

Codecov Report

Base: 95.50% // Head: 95.50% // No change to project coverage 👍

Coverage data is based on head (b9277db) compared to base (2d02fcf).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1777   +/-   ##
=======================================
  Coverage   95.50%   95.50%           
=======================================
  Files          20       20           
  Lines        1535     1535           
=======================================
  Hits         1466     1466           
  Misses         69       69           

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