Add and cancel recurring subscriptions support

[emilioeduardob]

Hi 👋 This small PR adds support for two endpoints of the subscription model

• Add a recurring subscription
• Cancel a recurring subscription
• Update recurring subscription

Also changed the supported version of faraday to support 2.x

[j4rs]

Hey Eduardo,

Thank you so much for the contribution 👏 , the PR looks great, do you mind completing the pull request by bumping the version and adding an entry to the changelog?

Thanks in advance.

[emilioeduardob]

Of course! Will do so