4.4.5

• Release Assets API for xero-node ( https://developer.xero.com/documentation/assets-api/overview )
• Added documentation for assets and changed directory structure

Version 3 (OAuth1.0a documentation) https://xeroapi.github.io/xero-node/v3/index.html (deprecated)
Accounting API documentation: https://xeroapi.github.io/xero-node/v4/accounting/index.html
Assets API documentation: https://xeroapi.github.io/xero-node/v4/assets/index.html