* upgrade stripe module
* switch stripe api to latest version
* fix api version in tests
* start upgrading client and server
* client: switch to redirect
* implement checkout session creation for gems, start implementing webhooks
* stripe: start refactoring one time payments
* working gems and gift payments
* start adding support for subscriptions
* stripe: migrate subscriptions and fix cancelling sub
* allow upgrading group plans
* remove console.log statements
* group plans: upgrade from static page / create new one
* fix#11885, correct group plan modal title
* silence more stripe webhooks
* fix group plans redirects
* implement editing payment method
* start cleaning up code
* fix(stripe): update in-code docs, fix eslint issues
* subscriptions tests
* remove and skip old tests
* skip integration tests
* fix client build
* stripe webhooks: throw error if request fails
* subscriptions: correctly pass groupId
* remove console.log
* stripe: add unit tests for one time payments
* wip: stripe checkout tests
* stripe createCheckoutSession unit tests
* stripe createCheckoutSession unit tests
* stripe createCheckoutSession unit tests (editing card)
* fix existing webhooks tests
* add new webhooks tests
* add more webhooks tests
* fix lint
* stripe integration tests
* better error handling when retrieving customer from stripe
* client: remove unused strings and improve error handling
* payments: limit gift message length (server)
* payments: limit gift message length (client)
* fix redirects when payment is cancelled
* add back "subUpdateCard" string
* fix redirects when editing a sub card, use proper names for products, check subs when gifting
* hide upgrade button for public guilds
* prevent group plans for public guilds
* fix unit tests
* fix integration and unit tests that assumed group plans could be public guilds
* more unit tests fixes
* more resilient unit test
* more resilient unit test
