Change Neon organization member's role

Automatically change Neon organization member's role on console.neon.tech. Change a joined member's role on the current Neon organization, identified by email. The role (Admin or Member) is matched case-insensitively. Only applies to members who have joined: a pending invite's role is set at invite time, so cancel and re-invite to change it. If the member already has the requested role, nothing changes and changed is false. Returns the member's email, resulting role, and whether a change occurred.