Fix unevaluatedProperties

[justin-tay]

Closes #962

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (5069ba4) 78.79% compared to head (8492923) 78.78%.

Files	Patch %	Lines
src/main/java/com/networknt/schema/JsonSchema.java	50.00%	0 Missing and 1 partial ⚠️

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Additional details and impacted files

@@             Coverage Diff              @@
##             master     #963      +/-   ##
============================================
- Coverage     78.79%   78.78%   -0.02%     
- Complexity     1767     1768       +1     
============================================
  Files           160      160              
  Lines          5797     5798       +1     
  Branches       1080     1081       +1     
============================================
  Hits           4568     4568              
  Misses          825      825              
- Partials        404      405       +1     

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