Release 3.21.0 * Upgraded Spring boot to 2.4.4 * Upgraded OpenAPI generator to 5.1.1 * Updates to OpenAPI * Allowed null in member attribute o365EmailAddresses_mu * Fixed sponsored member creation at MU * Specify language when calling MU pwd backend * Password reset using UUID as token * Suspending propagating tasks to engine * Removing authorization for password strength check * Added new methods for group stats * Csv option for namespace configuration * Fixed badge link in README * Allowed only new thanks in publications * Fixed optional ns config options