Support adding leads to email sequences

[cypris75]

The wrapper supports creating sequences but not adding contacts to sequences.

The wrapper should support the following API endpoint:

https://app.close.io/api/v1/sequence_subscription/

e.g. https://developer.close.io/#email-sequences-subscribe-a-contact-to-a-sequence

[cypris75]

Added PR here:
#22

[taylorbrooks]

Good to close?

[cypris75]

@taylorbrooks Can you check the status code please which is returned from the https://app.close.io/api/v1/sequence_subscription/ endpoint? I think it returns 201 instead of 200 which is technically correct however the script expects 200 to not throw an error.

[cypris75]

Fix would be to also allow 201 to the if statement:

if (!error && (response.statusCode === 200 || response.statusCode === 201)) {
      d.resolve(JSON.parse(body));
      return;
    }

[cypris75]

Any update on this one?

[taylorbrooks]

Will you open up a PR for that fix and I can test and merge?