Add support for draft 6

[OptimumCode]

Resolves #118

[codecov]

Codecov Report

Attention: Patch coverage is 98.18182% with 1 line in your changes missing coverage. Please review.

Project coverage is 90.75%. Comparing base (1799a1d) to head (9017701).

Files	Patch %	Lines
...schema/internal/config/Draft6SchemaLoaderConfig.kt	97.95%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #138      +/-   ##
==========================================
+ Coverage   90.64%   90.75%   +0.11%     
==========================================
  Files         124      126       +2     
  Lines        3688     3743      +55     
  Branches     1024     1027       +3     
==========================================
+ Hits         3343     3397      +54     
  Misses         65       65              
- Partials      280      281       +1     

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