Django-ses

Pulls:
- https://github.com/django-ses/django-ses/pull/267
- https://github.com/django-ses/django-ses/pull/269

Fixes:
- Support of SESv2 client. Fixes 229.

Pulls:
- https://github.com/django-ses/django-ses/pull/263

Fixes:
- Support newer versions of cryptography (loosen required version)
Fixes 262.

Pulls:
- https://github.com/django-ses/django-ses/pull/264

Fixes:
- Support different versions of requests (loosen required version)
Fixes 262. See also 263.

Pulls:
- https://github.com/django-ses/django-ses/pull/259

Fixes:
- Use eventType and fall back to notificationType consistently for SES events.
Fixes 174.

Pulls:
- https://github.com/django-ses/django-ses/pull/255
- https://github.com/django-ses/django-ses/pull/254
- https://github.com/django-ses/django-ses/pull/252
- https://github.com/django-ses/django-ses/pull/246


Features:
- Upgrade importlib-metadata

Pulls:
- https://github.com/django-ses/django-ses/pull/250

Features:
- Add support for temporary AWS credentials using session token.