Mark accounts as delinquent when has not any valid credit card

1.7.4

Update version to 1.7.4

Pay pending invoices endpoint

1.7.3

Update project version to 1.7.3

add credit-card-registered signal

1.7.2

add credit_card_registered signal

add credit-card-registered signal

1.7.1

add credit_card_registered signal

1.7 Mark accounts as delinquent

Update project version

modernize supported platforms and dependencies

Stop supporting django 2.1
Support django 3.0
New version of djmoney

due instead of overdue

1.5.4

replace overdue by due

export transactions

1.5.3

export transactions

1.5.2: Support django 2.2

- Unit tests now require that objects referenced by foreign keys
    exist in the database.
- 'make-migration --check' now requires a fully functional settings.py.

Also added test coverage reporting

1.5.1: finer credit-card status in admin

Both for accounts and invoices