[Snyk] Upgrade postcss from 8.2.10 to 8.4.18

[NOUIY]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to upgrade postcss from 8.2.10 to 8.4.18.

ℹ️ Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

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• The recommended version is 36 versions ahead of your current version.
• The recommended version was released 23 days ago, on 2022-10-12.

The recommended version fixes:

Severity	Issue	PriorityScore (*)	Exploit Maturity
	Regular Expression Denial of Service (ReDoS) SNYK-JS-POSTCSS-1255640	586/1000 Why? Proof of Concept exploit, Has a fix available, CVSS 5.3	Proof of Concept

(*) Note that the real score may have changed since the PR was raised.

Release notes

Package name: postcss

• 8.4.18 - 2022-10-12
  
  • Fixed an error on absolute: true with empty sourceContent (by @ KingSora).
• 8.4.17 - 2022-09-30
  
  • Fixed Node.before() unexpected behavior (by @ romainmenke).
  • Added TOC to docs (by @ muddv).
• 8.4.16 - 2022-08-06
  
  • Fixed Root AST migration.
• 8.4.15 - 2022-08-06
  
  • Fixed AST normalization after using custom parser with old PostCSS AST.
• 8.4.14 - 2022-05-18
  
  • Print “old plugin API” warning only if plugin was used (by @ zardoy).
• 8.4.13 - 2022-04-30
  
  • Fixed append() error after using .parent (by @ thecrypticace).
• 8.4.12 - 2022-03-16
  
  • Fixed package.funding to have same value between all PostCSS packages.
• 8.4.11 - 2022-03-15
  
  • Fixed Declaration#raws.value type.
• 8.4.10 - 2022-03-15
  
  • Fixed package.funding URL format.
• 8.4.9 - 2022-03-15
  
  • Fixed package.funding (by @ mondeja).
• 8.4.8 - 2022-03-07
• 8.4.7 - 2022-02-24
• 8.4.6 - 2022-02-01
• 8.4.5 - 2021-12-13
• 8.4.4 - 2021-11-27
• 8.4.3 - 2021-11-26
• 8.4.2 - 2021-11-26
• 8.4.1 - 2021-11-24
• 8.4.0 - 2021-11-24
• 8.3.11 - 2021-10-21
• 8.3.10 - 2021-10-20
• 8.3.9 - 2021-10-04
• 8.3.8 - 2021-09-25
• 8.3.7 - 2021-09-22
• 8.3.6 - 2021-07-21
• 8.3.5 - 2021-06-17
• 8.3.4 - 2021-06-14
• 8.3.3 - 2021-06-14
• 8.3.2 - 2021-06-11
• 8.3.1 - 2021-06-09
• 8.3.0 - 2021-05-21
• 8.2.15 - 2021-05-10
• 8.2.14 - 2021-05-05
• 8.2.13 - 2021-04-26
• 8.2.12 - 2021-04-22
• 8.2.11 - 2021-04-22
• 8.2.10 - 2021-04-11

from postcss GitHub release notes

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