Added two methods for checkitems

[rdorrigan]

The methods below set due dates and add members. The Trello API does not list either actions officially but does support it it in the UI and both worked in my production environment.
set_checklist_item_due()
set_checklist_item_member()

[xu2xulim]

Line 551 remainder = int(remainder) does not allow for string like “60.5”. Suggest remainder = int(float(remainder))

[rdorrigan]

Thank you! Updated.

[xu2xulim]

Based on my test, it seems that member and due dates will not be visible unless you are on business class. Do you have the same experience?

[rdorrigan]

I'm on a business class account for work, and am not experiencing that issue. I could note this in the comments.

[xu2xulim]

Add file via Upload👏🤞👍✅

[sarumont]

Happy to merge if you can resolve the conflicts!

[rdorrigan]

Conflicts resolved. I know I had an odd response with a 'checkbox' custom_field.field type. Which required the conflicting edits. I'll see if I can find some evidence and make another pull request later on.

[rdorrigan]

Reopening, I accidentally closed by trying to tidy up branch names.

[sarumont]

Thanks, @rdorrigan! Merged!

[xu2xulim]

@rdorrigan
Got this when testing the delete_custom_field_option.

trello.exceptions.ResourceUnavailable: {"error":"CUSTOM_FIELD_OPTION_NOT_FOUND","message":"Custom field option not found"} at https://api.trello.com/1/customFields/60d998eff903b078cdc2fc3c/options/60d998eff903b078cdc2fc3c (HTTP status: 404)

Both the definition ID and the option ID are the same? When I define my own def with

json_obj = client.fetch_json(
        'customFields/{0}/options/**{1}**'.format(custom_field_definition_id,option_id),
        http_method='DELETE',

for it to work. See highlighted portion {1}.
The same issue with get_custom_field_list_option

[rdorrigan]

@xu2xulim Thank you for identifying the error. I've tested and committed the requested changes. @sarumont would prefer a new pull request be opened?