JSDoc errors

[leekahung]

Describe the bug
Running npm run docs gives an error for generating certain types, namely userLIstObject.

To Reproduce
Steps to reproduce the behavior:

1. run npm run docs
2. error appears on terminal

Expected behavior
JSDoc is generated without errors

[leekahung]

Was able to clear one error for session-core by correcting the typing from Array[userListObject] either userListObject[] or Array.

Array feels more intuitive, but userListObject[] appears cleaner. Might use userListObject[] for the fix.

[leekahung]

Fixed issue by adding a dedicated types.d.ts file to assist typedefs.js in typing. Namely, I've added a type for useState:

useState = [T, React.Dispatch]

This will take in the state for T and the setState dispatch function for T

[leekahung]

Issue resolved as of PR #100. Closing issue.