Enhancement(membership): update choices for membership levels

[JacobCoffee]

What

pythondotorg/users/models.py

Lines 84 to 91 in fc856dd

	MEMBERSHIP_CHOICES = (
	(BASIC, 'Basic Member'),
	(SUPPORTING, 'Supporting Member'),
	(SPONSOR, 'Sponsor Member'),
	(MANAGING, 'Managing Member'),
	(CONTRIBUTING, 'Contributing Member'),
	(FELLOW, 'Fellow'),
	)

is outdated and needs to have its choices fixed following the bylaw change in psf/bylaws#4

[dorian-adams]

@JacobCoffee Just to clarify, are there users in the database with a membership type that’s planned for removal? If so, would it be helpful for me to create a function to convert those users to “basic” or some other type?

[JacobCoffee]

There are definitely managing members that would need to be converted to contributing members per the bylaw changes.