Translating src/rewards/admin from JS to TS

[aishaalsubaie]

I translated the javascript file src/rewards/admin.js into typescript. The import statements replaced require, type annotations were added to function parameters and variables, and interfaces defined the shapes of objects.

[coveralls]

Pull Request Test Coverage Report for Build 6024978051

• 52 of 61 (85.25%) changed or added relevant lines in 1 file are covered.
• 3 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.02%) to 84.968%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/rewards/admin.js	52	61	85.25%

Files with Coverage Reduction	New Missed Lines	%
src/messaging/notifications.js	1	96.55%
src/database/mongo/hash.js	2	88.07%

Totals
Change from base Build 5912059056:	-0.02%
Covered Lines:	22610
Relevant Lines:	25371

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💛 - Coveralls