fix(jsonpath): Properly handle len of object in array, len of int and len of bool

[TwiN]

Summary

Fixes #371
Fixes #370

Checklist

• Tested and/or added tests to validate that the changes work as intended, if applicable.
• Added the documentation in README.md, if applicable.

[codecov-commenter]

Codecov Report

Base: 81.88% // Head: 81.92% // Increases project coverage by +0.04% 🎉

Coverage data is based on head (dc080ef) compared to base (e9f46c5).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #372      +/-   ##
==========================================
+ Coverage   81.88%   81.92%   +0.04%     
==========================================
  Files          54       54              
  Lines        4047     4056       +9     
==========================================
+ Hits         3314     3323       +9     
  Misses        576      576              
  Partials      157      157              

Impacted Files	Coverage Δ
jsonpath/jsonpath.go	92.78% <100.00%> (+0.73%)	⬆️

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