pip(deps): update moto requirement from ~=3.0 to ~=3.1 (#227)

Updates the requirements on [moto](https://github.com/spulec/moto) to permit the latest version.
- [Release notes](https://github.com/spulec/moto/releases)
- [Changelog](https://github.com/spulec/moto/blob/master/CHANGELOG.md)
- [Commits](getmoto/moto@3.0.0...3.1.0)

---
updated-dependencies:
- dependency-name: moto
  dependency-type: direct:production
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Nicholas Cilfone <nicholas.cilfone@fmr.com>

requirements/DEV_REQUIREMENTS.txt

@@ -3,7 +3,7 @@ black~=21.4b0 ; python_version == '3.6'
 coveralls~=3.3
 coverage[toml]~=6.1
 isort~=5.10
-moto~=3.0
+moto~=3.1
 pydoc-markdown~=4.3, < 4.6.* ; python_version >= '3.7'
 pydoc-markdown~=3.13 ; python_version == '3.6'
 pytest~=7.0