docs(release): v1.2.0

[davidgrayston-paddle]

Changes: v1.1.2...release/v1.2.0

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Added

• Added product to subscription.items[], see related changelog
• Support for createdAt and updatedAt on Subscription notification prices
• Support custom prices when updating and previewing subscriptions, see related changelog
• TransactionsClient::getInvoicePDF now supports disposition parameter, see related changelog
• Support notification settings pagination, see related changelog
• Support notification settings active filter
• Support for notification_id on notification events

Fixed

• PreviewPrice operation no longer allows empty items
• Transaction payment_method_id can be string or null

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Upgrade Notes

Upgrading to this version introduces 2 changes that may require action

1. \Paddle\SDK\Entities\Shared\TransactionPaymentAttempt field paymentMethodId was string only,
   but has been aligned with the API to be string or null.

2. \Paddle\SDK\Resources\PricingPreviews\Operations field items has been aligned with the API and can no longer be empty.