Corrects treating 1.0 as an integer

[fdutton]

While investigating the issue, I found a previous refactoring left behind a large quantity of duplicated code. This has been removed.

[codecov-commenter]

Codecov Report

Merging #707 (708a04e) into master (636a346) will increase coverage by 1.52%.
The diff coverage is 96.77%.

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@@             Coverage Diff              @@
##             master     #707      +/-   ##
============================================
+ Coverage     73.91%   75.43%   +1.52%     
+ Complexity     1086     1078       -8     
============================================
  Files           105      105              
  Lines          3876     3778      -98     
  Branches        803      757      -46     
============================================
- Hits           2865     2850      -15     
+ Misses          703      639      -64     
+ Partials        308      289      -19     

Impacted Files	Coverage Δ
...n/java/com/networknt/schema/ValidationContext.java	84.78% <ø> (ø)
...java/com/networknt/schema/SpecVersionDetector.java	95.83% <91.66%> (-4.17%)	⬇️
...om/networknt/schema/ExclusiveMaximumValidator.java	41.86% <100.00%> (ø)
...om/networknt/schema/ExclusiveMinimumValidator.java	41.86% <100.00%> (ø)
...in/java/com/networknt/schema/MaximumValidator.java	70.21% <100.00%> (ø)
...in/java/com/networknt/schema/MinimumValidator.java	70.21% <100.00%> (ø)
.../main/java/com/networknt/schema/TypeValidator.java	100.00% <100.00%> (+38.01%)	⬆️
.../java/com/networknt/schema/utils/JsonNodeUtil.java	62.29% <100.00%> (+26.58%)	⬆️

... and 1 file with indirect coverage changes

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