Bump apollo-server-express from 2.25.2 to 3.6.4

Bumps [apollo-server-express](https://github.com/apollographql/apollo-server/tree/HEAD/packages/apollo-server-express) from 2.25.2 to 3.6.4.
- [Release notes](https://github.com/apollographql/apollo-server/releases)
- [Changelog](https://github.com/apollographql/apollo-server/blob/main/CHANGELOG.md)
- [Commits](https://github.com/apollographql/apollo-server/commits/[email protected]/packages/apollo-server-express)

---
updated-dependencies:
- dependency-name: apollo-server-express
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]