Declare Push Notifications on the widget extension's App ID

The widget is refreshed by WidgetKit push, so the extension holds its own APNs
token and its provisioning profile needs the aps-environment entitlement. The
identifiers lane declared App Groups only, so the App Store profile was issued
without it and the archive failed on the widget target.

The side-by-side test build had the capability added directly through Xcode's
provisioning updates, which is why this went unnoticed until the first CI build:
that path never touches the Fastfile, and the Fastfile is what CI provisions
from.

Author: JustMaier

fastlane/Fastfile

@@ -178,8 +178,14 @@ platform :ios do
       Spaceship::ConnectAPI::BundleIdCapability::Type::APP_GROUPS
     ])
 
+    # Push Notifications because the widget is refreshed by WidgetKit push: the
+    # extension holds its own APNs token and its provisioning profile needs the
+    # aps-environment entitlement to carry it. Without this the App Store profile
+    # is issued without it and the archive fails on the widget target, which is
+    # the first place the omission can be noticed.
     configure_bundle_id("LoopFollow Widget Extension", WIDGET_IDENTIFIER, [
-      Spaceship::ConnectAPI::BundleIdCapability::Type::APP_GROUPS
+      Spaceship::ConnectAPI::BundleIdCapability::Type::APP_GROUPS,
+      Spaceship::ConnectAPI::BundleIdCapability::Type::PUSH_NOTIFICATIONS
     ])
 
   end