As of May 23rd, 2019, subscriptions in the
trialing state may be placed on hold.
If you allow the customer to place their subscriptions on hold themselves (i.e. via the Billing Portal), you will want to ensure that you are reacting to state changes into the
on_hold state, since there are now potentially more opportunities for them to choose to pause/hold the subscription.
Placing a subscription on hold was previously only available when a subscription was in
active state. Now placing a subscription on hold is available when a subscription is either