build(deps): bump phonenumbers from 8.12.12 to 8.12.13

Bumps [phonenumbers](https://github.com/daviddrysdale/python-phonenumbers) from 8.12.12 to 8.12.13.
- [Release notes](https://github.com/daviddrysdale/python-phonenumbers/releases)
- [Commits](daviddrysdale/python-phonenumbers@v8.12.12...v8.12.13)

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

{{cookiecutter.project_slug}}/requirements.txt

@@ -98,7 +98,7 @@ openpyxl==3.0.5           # via -r {{cookiecutter.project_slug}}/requirements.in
 packaging==20.4           # via bleach, commitizen, pytest, pytest-sugar
 pathspec==0.8.0           # via black
 pbr==5.5.0                # via stevedore
-phonenumbers==8.12.12     # via -r {{cookiecutter.project_slug}}/requirements.in
+phonenumbers==8.12.13     # via -r {{cookiecutter.project_slug}}/requirements.in
 phonenumberslite==8.12.10  # via faker-e164
 pillow==7.2.0             # via wagtail
 pip-api==0.0.14           # via isort