Update dependency django-payments to v3

This MR contains the following updates:

Package	Type	Update	Change
django-payments (changelog)	dependencies	major	^1.0.0 -> ^3.0.0

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Release Notes

jazzband/django-payments

v3.0.1

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This version is functionally identically to v3.0.0, and only includes a fix in our pipeline that prevented the previous version from being published to PyPI.

v2.0.0

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• Breaking: The todopago backend has been dropped. The payment provider has [quite suddenly] announced it's shutting down.
• Older versions of django-phonenumber-field are now also supported. There was no intrinsic incompatibility; the pinned version was merely too restrictive.
• Various documentation improvements.

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