We migrated to typescript in #6, but the port was incomplete. The effort was barely enough to get us running. We still do not follow typescript practices, the code is yet to get the benefit of the type-safety features of typescript.

This issue will track the progress of a proper typescript conversion.

1. [x]: Add type annotations where missing #57
2. [x]: Eliminate the use of any type, introduce interfaces where required #57
3. [x]: Remove duplicated or redundant code #57