5.3.0-customercenter.alpha.4

• Open App Store when the user wants to update their app (#4199) via JayShortway (@JayShortway)
• Move sheet and restore alert creation to ManageSubscriptionsView (#4220) via Cesar de la Vega (@vegaro)
• Shows a warning when the app is not the latest version (#4193) via JayShortway (@JayShortway)
• Add padding to No thanks in promotional offer screen (#4221) via Cesar de la Vega (@vegaro)
• Fix FeedbackSurveyView not opening (#4208) via Cesar de la Vega (@vegaro)
• Migrate to List style (#4190) via Cody Kerns (@codykerns)
• Hide Contact Support button if URL can't be created (#4192) via Cesar de la Vega (@vegaro)
• Improving customer center buttons (#4165) via Cody Kerns (@codykerns)
• Clean up colors in WrongPlatformView and NoSubscriptionsView (#4204) via Cesar de la Vega (@vegaro)
• CustomerCenterViewModel checks whether the app is the latest version (#4169) via JayShortway (@JayShortway)
• Corrects references from ManageSubscriptionsButtonStyle to ButtonsStyle. (#4186) via JayShortway (@JayShortway)
• Customer center improvements (#4166) via James Borthwick (@jamesrb1)
• replace color(from colorInformation:) global with extension (#4183) via Andy Boedo (@aboedo)
• Enable customer center tests (#4171) via James Borthwick (@jamesrb1)