Add charges_from_date to InvoiceObject

[lorddaedra]

prance.ValidationError: ("Required list has not defined properties: ['charges_from_date']", <unset>, (), None, (), <unset>, <unset>, <unset>, (), None)

Try to execute this command to get error:

$ python -m pip install -U openapi3-parser && \
python -c "from openapi_parser import parse; specification = parse('https://raw.githubusercontent.com/getlago/lago-openapi/main/swagger.yaml')"

Is required for: getlago/lago-python-client#95

[lorddaedra]

Interesting,

openapi-spec-validator-0.4.0 -> error
openapi-spec-validator-0.5.5 -> OK

[lorddaedra]

We have charges_from_date in required list inside InvoiceObject. But we do not have the same charges_from_date inside properties list. This is not OpenAPI spec bug. Validation passes.

Related issue: python-openapi/openapi-spec-validator#97

But this is bug of your API contract with end users because of charges_from_date property exists in InvoiceObject here: https://doc.getlago.com/docs/api/invoices/invoice-object