Bump django-countries from 6.1.3 to 7.2.1

[dependabot-preview]

Bumps django-countries from 6.1.3 to 7.2.1.

Changelog

Sourced from django-countries's changelog.

7.2.1 (11 May 2021)

• Fix Latin translations.

7.2 (10 May 2021)

• Allow the character field to work with custom country codes that are not 2 characters (such as "GB-WLS").
• Fix compatibility with django-migrations-ignore-attrs library.

7.1 (17 March 2021)

• Allow customising the str_attr of Country objects returned from a CountryField via a new countries_str_attr keyword argument (thanks C. Quentin).
• Add pyuca as an extra dependency, so that it can be installed like pip install django-countries[pyuca].
• Add Django 3.2 support.

7.0 (5 December 2020)

• Add name_only as an option to the Django Rest Framework serializer field (thanks Miguel Marques).
• Add in Python typing.
• Add Python 3.9, Django 3.1, and Django Rest Framework 3.12 support.
• Drop Python 3.5 support.
• Improve IOC code functionality, allowing them to be overridden in COUNTRIES_OVERRIDE using the complex dictionary format.

Commits

• ae2b87d Preparing release 7.2.1
• 57e798e Add latin translations. Refs #347
• 506bb32 Update languages
• 5b76f19 Better method for language mapping. Fixes #347
• 471b942 Back to development: 7.3
• 2ad0275 Preparing release 7.2
• 41a693d Add changes for merge
• ef4fa03 Allow for overriden country codes that are not two characters
• a5b56c0 Filter graphene warning in tests
• 5faf60f Merge pull request #346 from druids/PopChoicesShouldHaveDefaultValue
• Additional commits viewable in compare view

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