Widen @aws-appsync/eslint-plugin peer dep range to include eslint 10

[bilalq]

Summary

@aws-appsync/eslint-plugin@2.0.2 declares its eslint peer dependency as:

"peerDependencies": {
  "eslint": "^8.57.0 || ^9.0.0"
}

This causes ERESOLVE failures on npm install for projects that have upgraded to ESLint v10, even though the plugin appears to
be runtime-compatible.

Why I believe v10 compatibility is already there

I inspected lib/index.js in the published tarball. The plugin:

• Imports only @typescript-eslint/parser from the eslint ecosystem — no eslint internals, no Linter, no rule-tester used at
  runtime.
• Exports flat-config-shaped configs (plugin.configs.recommended uses plugins / languageOptions / rules), which is the shape
  ESLint v9+ consumes natively.
• Each rule file is a standard ESLint rule object (meta + create) that uses only the public rule API.

There's nothing I can see that would break on v10.

Verification

With npm install --legacy-peer-deps to bypass the peer check, I'm running the plugin successfully under:

• eslint@10.1.0
• @typescript-eslint/parser@8.58.0
• NodeJS 24.14.1

eslint --print-config confirms all 22 @aws-appsync/* rules are applied to matched resolver files, and lint runs complete without errors against our resolver sources.

Requested change

Widen the peer range to include v10:

"peerDependencies": {                                                                                                        
  "eslint": "^8.57.0 || ^9.0.0 || ^10.0.0"
}