v0.16.9

[daveshanley]

Adds GetKeyNode and GetRootNode methods to low level models. Useful for interfaces in downstream applications.
A general tuneup in various places after hammering the library as part of a larger stack of applications.

Addresses issues:

• Panic During Schema Rendering #285

[codecov]

Codecov Report

Attention: Patch coverage is 98.71795% with 3 lines in your changes missing coverage. Please review.

Project coverage is 99.63%. Comparing base (f27d57a) to head (9a7564d).

Files	Patch %	Lines
datamodel/high/node_builder.go	72.72%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #300      +/-   ##
==========================================
+ Coverage   99.59%   99.63%   +0.04%     
==========================================
  Files         162      162              
  Lines       16103    16295     +192     
==========================================
+ Hits        16037    16236     +199     
+ Misses         61       54       -7     
  Partials        5        5              

Flag	Coverage Δ
unittests	99.63% <98.71%> (+0.04%)	⬆️

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[daveshanley]

I cannot bump the coverage in the node builder. Overall overage is lifted by 0.06%