Bump pympler from 1.0.1 to 1.1 in /requirements

Bumps [pympler](https://github.com/pympler/pympler) from 1.0.1 to 1.1.
- [Changelog](https://github.com/pympler/pympler/blob/master/CHANGELOG.md)
- [Commits](pympler/pympler@1.0.1...1.1)

---
updated-dependencies:
- dependency-name: pympler
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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