0.0.4 Release Candidate

Changes:

• Changed parameter useHandler to handler in createService(), meaning hook calls are no longer allowed in the user-defined handler. After usage testing, it seemed burdensome to require the user to properly call useEffect() in the handler in order to prevent double-invoking their fetching logic in React Strict Mode.
• Added ESLint to enforce a consistent code-styling and other semantic contracts like Rules of Hooks that aren't covered by typechecking alone.
• Added MIT license file