Bump arch from 7.0.0 to 7.1.0 (#317)

Bumps [arch](https://github.com/bashtage/arch) from 7.0.0 to 7.1.0.
- [Release notes](https://github.com/bashtage/arch/releases)
- [Commits](bashtage/arch@v7.0.0...v7.1.0)

---
updated-dependencies:
- dependency-name: arch
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 alphalens-reloaded==0.4.4
-arch==7.0.0
+arch==7.1.0
 arviz==0.19.0
 bambi==0.14.0
 bcolz-zipline @ git+https://github.com/stefan-jansen/bcolz-zipline.git@main