fix: safe integer bounds conversion

[laljikanjareeya]

Instead of checking MIN_SAFE_INTEGER and MAX_SAFE_INTEGER condition, Added embedded function Number.isSafeInteger to check safe integer.

• Ensure the tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

Fixes #575

[codecov]

Codecov Report

Merging #576 into master will increase coverage by 0.05%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #576      +/-   ##
==========================================
+ Coverage   86.77%   86.82%   +0.05%     
==========================================
  Files          33       33              
  Lines        1981     1981              
  Branches      349      349              
==========================================
+ Hits         1719     1720       +1     
  Misses        233      233              
+ Partials       29       28       -1

Impacted Files	Coverage Δ
src/mutation.ts	92.53% <100%> (+1.49%)	⬆️

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[AVaksman]

@laljikanjareeya could you please also add a unit test(s) where {isPossibleNumber: true} is passed, but value to be decoded is outside of bounds of Number (smaller than min, larger then max).

[laljikanjareeya]

@laljikanjareeya could you please also add a unit test(s) where {isPossibleNumber: true} is passed, but value to be decoded is outside of bounds of Number (smaller than min, larger then max).

@AVaksman Added more unit tests for outside of bounds.

[AVaksman]

LGTM