Coerce order amounts to bigint

[fmrsabino]

• Coerces the order amounts from a string to a bigint.
• This change will enable doing arithmetic operations without validating and converting the respective values to a number.

[coveralls]

Pull Request Test Coverage Report for Build 8267898159

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.001%) to 93.697%

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Files with Coverage Reduction	New Missed Lines	%
src/routes/transactions/entities/tests/human-description.builder.ts	1	90.0%

Totals
Change from base Build 8266258691:	-0.001%
Covered Lines:	6361
Relevant Lines:	6564

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💛 - Coveralls