Bump i from 0.3.6 to 0.3.7 in /tests/dummy

Bumps [i](https://github.com/pksunkara/inflect) from 0.3.6 to 0.3.7.
- [Release notes](https://github.com/pksunkara/inflect/releases)
- [Commits](pksunkara/inflect@v0.3.6...v0.3.7)

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

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Author: dependabot[bot]