Translating src/categories/watch.js from JS to TS

[ArunSaiNarla]

This Resolves Issue #67

1. Changed the syntax of Import Statements
2. Created Custom Interfaces wherever it is required
3. Ran npm run lint, npm run test locally and made sure there were no errors and all the tests were passing.
4. Modified categories.js to Fix the Time-Out Issue.

[coveralls]

Pull Request Test Coverage Report for Build 7743963465

• -8 of 38 (78.95%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.007%) to 85.086%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/categories/watch.js	30	38	78.95%
<!--	Total:	30	38	78.95%	-->

Files with Coverage Reduction	New Missed Lines	%
src/groups/join.js	1	92.05%
<!--	Total:	1		-->

Totals
Change from base Build 7649102120:	-0.007%
Covered Lines:	22632
Relevant Lines:	25363

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💛 - Coveralls