Bump ajv from 6.6.1 to 6.12.6 in /chess_src (#19)
Bump ajv from 6.6.1 to 6.12.6 in /chess_src (#19)

Bumps [ajv](https://github.com/ajv-validator/ajv) from 6.6.1 to 6.12.6.
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](https://github.com/ajv-validator/ajv/compare/v6.6.1...v6.12.6)

---
updated-dependencies:
- dependency-name: ajv
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
achansen121/chess-js,achansen121/chess-js