build(deps-dev): bump @types/json-schema from 7.0.12 to 7.0.15 (#197)

Bumps [@types/json-schema](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/json-schema) from 7.0.12 to 7.0.15.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/json-schema)

---
updated-dependencies:
- dependency-name: "@types/json-schema"
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>