Requesting fewer records than one page causes infinite loop

[jmosul]

When making a request that results in fewer results than contained in a single response of the API, request will be repeated infinitely.

See example below:

    const structure = {
        date: 'date',
        areaName: 'areaName',
        cumPeopleVaccinatedFirstDoseByPublishDate: 'cumPeopleVaccinatedFirstDoseByPublishDate',
    };

    const filters = ['areaType=nation'];

    const api = new Cov19API({
        filters,
        structure,
        latestBy: 'cumPeopleVaccinatedFirstDoseByPublishDate',
    });

I would expect this to have been caused by a change to the API that means page 1 returns the same result as page 2. As can be seen in the below examples.

Example Page 1

Example Page 2

With API.getData looping until it receives a 204 or an error, this will now loop indefinitely:

https://github.com/publichealthengland/coronavirus-dashboard-api-javascript-sdk/blob/7ac7f6fbc06450a122ea446ee4fe78023eb4950d/lib/UKCovid19.ts#L120-L137