Changes on minor version update:
• Bug fixes:
 Patch for Rollbar#1483
 Cleanup old booked tokens
 Bug in test setup page MacOS: First time starting left eye test, redirects to right eye
 instructions page
 Bug in test setup page MacOS: Contrast modal not rendering targets

• Features:
 Restructure practice signup initial page
 Add referral codes (including Admin changes)
 Support multiple distributors for a single country
 Better handling for existing customers when switching a country from distributor to
 stripe or vice versa
 Better logging of errors calling integration webhooks
 Allow multiple practices/enterprises to share the same phone number
 Send clinician registration notifications to superadmins also
 Switch back to Clinician using Pin
 Add enterprise account type