[Snyk] Security upgrade rollup-plugin-postcss from 2.9.0 to 4.0.1

[nadia-reinertsen]

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

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

#### Changes included in this PR - Changes to the following files to upgrade the vulnerable dependencies to a fixed version: - package.json - package-lock.json #### Vulnerabilities that will be fixed ##### With an upgrade: Severity | Priority Score (*) | Issue | Breaking Change | Exploit Maturity :-------------------------:|-------------------------|:-------------------------|:-------------------------|:-------------------------  | **159/1000**
**Why?** Confidentiality impact: None, Integrity impact: None, Availability impact: High, Scope: Unchanged, Exploit Maturity: Proof of Concept, User Interaction (UI): None, Privileges Required (PR): None, Attack Complexity: Low, Attack Vector: Network, EPSS: 0.00299, Social Trends: No, Days since published: 807, Reachable: No, Transitive dependency: Yes, Is Malicious: No, Business Criticality: High, Provider Urgency: High, Package Popularity Score: 99, Impact: 5.99, Likelihood: 2.65, Score Version: V5 | Regular Expression Denial of Service (ReDoS)
[SNYK-JS-ANSIREGEX-1583908](https://snyk.io/vuln/SNYK-JS-ANSIREGEX-1583908) | Yes | Proof of Concept  | **63/1000**
**Why?** Confidentiality impact: None, Integrity impact: None, Availability impact: Low, Scope: Unchanged, Exploit Maturity: Proof of Concept, User Interaction (UI): None, Privileges Required (PR): None, Attack Complexity: Low, Attack Vector: Network, EPSS: 0.00153, Social Trends: No, Days since published: 945, Reachable: No, Transitive dependency: Yes, Is Malicious: No, Business Criticality: High, Provider Urgency: Medium, Package Popularity Score: 99, Impact: 2.35, Likelihood: 2.64, Score Version: V5 | Regular Expression Denial of Service (ReDoS)
[SNYK-JS-POSTCSS-1255640](https://snyk.io/vuln/SNYK-JS-POSTCSS-1255640) | Yes | Proof of Concept  | **49/1000**
**Why?** Confidentiality impact: None, Integrity impact: Low, Availability impact: None, Scope: Unchanged, Exploit Maturity: No data, User Interaction (UI): None, Privileges Required (PR): None, Attack Complexity: Low, Attack Vector: Network, EPSS: 0.00045, Social Trends: No, Days since published: 58, Reachable: No, Transitive dependency: Yes, Is Malicious: No, Business Criticality: High, Provider Urgency: Medium, Package Popularity Score: 99, Impact: 2.35, Likelihood: 2.06, Score Version: V5 | Improper Input Validation
[SNYK-JS-POSTCSS-5926692](https://snyk.io/vuln/SNYK-JS-POSTCSS-5926692) | Yes | No Known Exploit (*) Note that the real score may have changed since the PR was raised. Check the changes in this PR to ensure they won't cause issues with your project. ------------ **Note:** *You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs.* For more information: 🧐 [View latest project report](https://app.snyk.io/org/videx/project/39554c49-a9f2-44b5-9f73-5a45e9e1c017?utm_source=github&utm_medium=referral&page=fix-pr) 🛠 [Adjust project settings](https://app.snyk.io/org/videx/project/39554c49-a9f2-44b5-9f73-5a45e9e1c017?utm_source=github&utm_medium=referral&page=fix-pr/settings) 📚 [Read more about Snyk's upgrade and patch logic](https://support.snyk.io/hc/en-us/articles/360003891078-Snyk-patches-to-fix-vulnerabilities) [//]: # (snyk:metadata:{"prId":"ea296c32-02d8-47c8-92f0-cec6395347bb","prPublicId":"ea296c32-02d8-47c8-92f0-cec6395347bb","dependencies":[{"name":"rollup-plugin-postcss","from":"2.9.0","to":"4.0.1"}],"packageManager":"npm","projectPublicId":"39554c49-a9f2-44b5-9f73-5a45e9e1c017","projectUrl":"https://app.snyk.io/org/videx/project/39554c49-a9f2-44b5-9f73-5a45e9e1c017?utm_source=github&utm_medium=referral&page=fix-pr","type":"auto","patch":[],"vulns":["SNYK-JS-ANSIREGEX-1583908","SNYK-JS-POSTCSS-1255640","SNYK-JS-POSTCSS-5926692"],"upgrade":["SNYK-JS-ANSIREGEX-1583908","SNYK-JS-POSTCSS-1255640","SNYK-JS-POSTCSS-5926692"],"isBreakingChange":true,"env":"prod","prType":"fix","templateVariants":["updated-fix-title","priorityScore"],"priorityScoreList":[159,63,49],"remediationStrategy":"vuln"}) --- **Learn how to fix vulnerabilities with free interactive lessons:** 🦉 [Regular Expression Denial of Service (ReDoS)](https://learn.snyk.io/lesson/redos/?loc=fix-pr) 🦉 [Improper Input Validation](https://learn.snyk.io/lesson/improper-input-validation/?loc=fix-pr)

[fbosquet-azpn]

this review is superseeded by my review #236