Resolve type error when running JS tests locally

[captainsafia]

Imports the type declaration that adds BINDING to the global object to ensure that the tests can run locally.

Resolves the following issue that we currently have when running JS tests locally.

    TypeScript diagnostics (customize using `[jest-config].globals.ts-jest.diagnostics` option):
    src/Platform/Profiling.ts:127:44 - error TS2304: Cannot find name 'BINDING'.

    127     return typeof str === 'string' ? str : BINDING.conv_string(str);

[SteveSandersonMS]

Thanks!

[ghost]

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