Bump minimist, mkdirp, loader-fs-cache and potrace

Bumps [minimist](https://github.com/minimistjs/minimist), [mkdirp](https://github.com/isaacs/node-mkdirp), [loader-fs-cache](https://github.com/viankakrisna/loader-fs-cache) and [potrace](https://github.com/tooolbox/node-potrace). These dependencies needed to be updated together.

Updates `minimist` from 1.2.0 to 1.2.8
- [Release notes](https://github.com/minimistjs/minimist/releases)
- [Changelog](https://github.com/minimistjs/minimist/blob/main/CHANGELOG.md)
- [Commits](https://github.com/minimistjs/minimist/compare/v1.2.0...v1.2.8)

Updates `mkdirp` from 0.5.1 to 0.5.6
- [Release notes](https://github.com/isaacs/node-mkdirp/releases)
- [Changelog](https://github.com/isaacs/node-mkdirp/blob/main/CHANGELOG.md)
- [Commits](https://github.com/isaacs/node-mkdirp/compare/0.5.1...v0.5.6)

Updates `loader-fs-cache` from 1.0.2 to 1.0.3
- [Release notes](https://github.com/viankakrisna/loader-fs-cache/releases)
- [Commits](https://github.com/viankakrisna/loader-fs-cache/commits)

Updates `potrace` from 2.1.2 to 2.1.8
- [Release notes](https://github.com/tooolbox/node-potrace/releases)
- [Commits](https://github.com/tooolbox/node-potrace/commits/v2.1.8)

---
updated-dependencies:
- dependency-name: minimist
  dependency-type: indirect
- dependency-name: mkdirp
  dependency-type: indirect
- dependency-name: loader-fs-cache
  dependency-type: indirect
- dependency-name: potrace
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -12,7 +12,7 @@
     "gatsby-plugin-react-helmet": "^3.1.13",
     "gatsby-plugin-sharp": "^4.25.1",
     "gatsby-source-filesystem": "^2.1.35",
-    "gatsby-transformer-sharp": "^2.12.1",
+    "gatsby-transformer-sharp": "^2.3.1",
     "prop-types": "^15.7.2",
     "react": "^16.11.0",
     "react-dom": "^16.11.0",