Bump @graphql-tools/relay-operation-optimizer from 7.0.19 to 7.0.21

Bumps [@graphql-tools/relay-operation-optimizer](https://github.com/ardatan/graphql-tools/tree/HEAD/packages/relay-operation-optimizer) from 7.0.19 to 7.0.21.
- [Release notes](https://github.com/ardatan/graphql-tools/releases)
- [Changelog](https://github.com/ardatan/graphql-tools/blob/master/packages/relay-operation-optimizer/CHANGELOG.md)
- [Commits](https://github.com/ardatan/graphql-tools/commits/@graphql-tools/[email protected]/packages/relay-operation-optimizer)

---
updated-dependencies:
- dependency-name: "@graphql-tools/relay-operation-optimizer"
  dependency-version: 7.0.21
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]