fix: asset versions sort order

[sudo-suhas]

Fix sort order in asset versions response, don't sort version field as string. Without the fix, for an asset with 99 versions on applying the filter {Size: 3, Offset: 86}, expected versions = {0.13, 0.12, 0.11} but actual versions = {0.20, 0.2, 0.19}.

[coveralls]

Pull Request Test Coverage Report for Build 4856853670

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 85.813%

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Totals
Change from base Build 4829835418:	0.0%
Covered Lines:	5087
Relevant Lines:	5928

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💛 - Coveralls