Potential issue with the JSON Schema

[gk-drw]

Environment details

• OS: any (MacOS / Linux)
• Node.js version: any (v20)
• npm version: any
• release-please version: latest

Steps to reproduce

A schema that contains incorrect properties isn't reported, e.g.

{
  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/refs/heads/main/schemas/config.json",
  "packages": {
    ".": {
      "application-type": "simple",
      "extra-files": ["README.md"],
      "other-non-existent-property": "no-errors"
    }
  }
}

doesn't report issues.

This is because ReleaserConfigOptions doesn't have "additionalProperties": false in its specs.

Adding this field would cause conflicts with allOf, so that needs to be changed to anyOf as well to allow for both single-package configs and multi-package configs

[gk-drw]

tagging @isaacsanders