Why?

We decided to allow add_beta_version to overwrite an existing beta version

What?

• Validates that beta_version is of the form "v" + a number
• Allows overwriting existing beta_name. The new behavior is that the higher beta_version is accepted instead of raising an Exception.

Changelog

• stripe.add_beta_version will use the highest version number used for a beta feature instead of raising an Exception on a conflict as it had done previously.