chore(deps): bump postgres-types from 0.2.7 to 0.2.9

Bumps [postgres-types](https://github.com/sfackler/rust-postgres) from 0.2.7 to 0.2.9.
- [Release notes](https://github.com/sfackler/rust-postgres/releases)
- [Commits](rust-postgres/rust-postgres@postgres-types-v0.2.7...postgres-types-v0.2.9)

---
updated-dependencies:
- dependency-name: postgres-types
  dependency-version: 0.2.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]