TRP.js v0.4.1 release draft

[athewsey]

Issue #, if available: #177

Description of changes:

• Prevent page.layout.{html(), str(), text} from duplicating the content of LAYOUT_TEXT items also referenced as children of LAYOUT_LISTs: Since a PAGE block's children includes all the layout items their interrelations.
• Add some basic accessor methods for traversing nested layout item relationships, and support toggling recursive vs non-recursive in page.layout.{iterItems(), listItems()}
• Deprecate ambiguous page.layout.nItems in favour of .nItemsTotal (the old behaviour counting everything) and .nItemsDirect (counting only top-level layout items)
• Add iter/listRelatedItemsByRelType() accessors for directly iterating related items, rather than user code always having to resolve block IDs to parsed items. These new methods have filtering & logging/error params which I hope we can standardise more across TRP.js in future releases (but not a patch release, as some breaking changes wrt handling of invalid Textract JSONs would likely be unavoidable - current behaviour is inconsistent between sub-modules)

Testing:

New unit tests created to catch the bug behaviour and cover the new additions.

Working version published at NPM v0.4.1-alpha.1 for testing: Please share feedback!

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[athewsey]

Now released to version v0.4.1 on NPM