Release 3.2.0 (#426)

## New Features

- **Account Updater API**: New client for managing card account updates
- **Identities API**: Complete client with 6 submodules (AML screenings, applicants, face authentications, ID document verifications, identity verifications, delegation)
- **Issuing API**: Expanded with 10 new submodules (access, cardholders, cards, control groups, control profiles, controls, digital cards, disputes, simulate, transactions)
- **Network Tokens API**: New client for network token management
- **Payment Methods API**: New client for payment method operations

## Improvements

- **Error Handling**: Enhanced error propagation for 401/403/404 responses with detailed error.body
- **Code Organization**: Refactored core modules (Checkout.js, Platforms, HTTP service) for better maintainability
- **Test Suite**: Reorganized 51+ test files with better separation between unit and integration tests
- **Documentation**: Improved JSDoc annotations with @memberof tags, updated README with new architecture examples

## Technical Details

- Reduced Checkout.js from ~200 lines to ~46 lines through modularization
- Split Platforms API into focused submodules (subentity, files, payment-instruments, payout-schedules, reserve-rules)
- Enhanced HTTP client with better response processing and error context
- Added TypeScript definitions for all new API clients
- Test coverage: 97.89% (818 tests passing)

All changes maintain backward compatibility.

Author: armando-rodriguez-cko

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "checkout-sdk-node",
-  "version": "3.1.0",
+  "version": "3.2.0",
   "description": "Official Node.js SDK for Checkout.com payment gateway - Full API coverage with TypeScript support",
   "type": "module",
   "engines": {