[Snyk] Security upgrade gatsby-plugin-sharp from 4.1.0 to 4.23.0

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 `yarn` dependencies of this project.

![merge advice](https://app.snyk.io/badges/merge-advice/?package_manager=yarn&package_name=gatsby-plugin-sharp&from_version=4.1.0&to_version=4.23.0&pr_id=c5f14184-f6c1-4bbd-90ca-88e594d1b99a&visibility=true&has_feature_flag=false) #### Changes included in this PR - Changes to the following files to upgrade the vulnerable dependencies to a fixed version: - package.json - yarn.lock #### Vulnerabilities that will be fixed ##### With an upgrade: Severity | Priority Score (*) | Issue | Breaking Change | Exploit Maturity :-------------------------:|-------------------------|:-------------------------|:-------------------------|:------------------------- ![high severity](https://res.cloudinary.com/snyk/image/upload/w_20,h_20/v1561977819/icon/h.png "high severity") | **696/1000**
**Why?** Proof of Concept exploit, Has a fix available, CVSS 7.5 | Regular Expression Denial of Service (ReDoS)
[SNYK-JS-NTHCHECK-1586032](https://snyk.io/vuln/SNYK-JS-NTHCHECK-1586032) | No | Proof of Concept (*) 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/thatcrazyirishguy/project/03293576-d8f5-4649-bb09-dbbff6a1088b?utm_source=github&utm_medium=referral&page=fix-pr) 🛠 [Adjust project settings](https://app.snyk.io/org/thatcrazyirishguy/project/03293576-d8f5-4649-bb09-dbbff6a1088b?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":"c5f14184-f6c1-4bbd-90ca-88e594d1b99a","prPublicId":"c5f14184-f6c1-4bbd-90ca-88e594d1b99a","dependencies":[{"name":"gatsby-plugin-sharp","from":"4.1.0","to":"4.23.0"}],"packageManager":"yarn","projectPublicId":"03293576-d8f5-4649-bb09-dbbff6a1088b","projectUrl":"https://app.snyk.io/org/thatcrazyirishguy/project/03293576-d8f5-4649-bb09-dbbff6a1088b?utm_source=github&utm_medium=referral&page=fix-pr","type":"auto","patch":[],"vulns":["SNYK-JS-NTHCHECK-1586032"],"upgrade":["SNYK-JS-NTHCHECK-1586032"],"isBreakingChange":false,"env":"prod","prType":"fix","templateVariants":["updated-fix-title","priorityScore","merge-advice-badge-shown"],"priorityScoreList":[696]}) --- **Learn how to fix vulnerabilities with free interactive lessons:** 🦉 [Regular Expression Denial of Service (ReDoS)](https://learn.snyk.io/lessons/redos/javascript/?loc=fix-pr)

darrenbritton / darrenbritton.github.io

[Snyk] Security upgrade gatsby-plugin-sharp from 4.1.0 to 4.23.0 #162

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