build(deps): bump image-size from 1.2.0 to 1.2.1 in /docs (#210)

Bumps [image-size](https://github.com/image-size/image-size) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/image-size/image-size/releases)
- [Commits](https://github.com/image-size/image-size/compare/v1.2.0...v1.2.1)

---
updated-dependencies:
- dependency-name: image-size
  dependency-version: 1.2.1
  dependency-type: indirect
...

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docs/package-lock.json

@@ -10184,9 +10184,9 @@
       }
     },
     "node_modules/image-size": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/image-size/-/image-size-1.2.0.tgz",
-      "integrity": "sha512-4S8fwbO6w3GeCVN6OPtA9I5IGKkcDMPcKndtUlpJuCwu7JLjtj7JZpwqLuyY2nrmQT3AWsCJLSKPsc2mPBSl3w==",
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/image-size/-/image-size-1.2.1.tgz",
+      "integrity": "sha512-rH+46sQJ2dlwfjfhCyNx5thzrv+dtmBIhPHk0zgRUukHzZ/kRueTJXoYYsclBaKcSMBWuGbOFXtioLpzTb5euw==",
       "license": "MIT",
       "dependencies": {
         "queue": "6.0.2"