Status not robust in the data layer

[MadeofTin]

In /data/proposals.js final is the only valid option. If the status is Final it breaks the system. When we pull directly from the Source of EIPs it would be better to be robust to minor changes in case that they happen on their end.

Perhaps some sanitation in the view layer that is capitalization agnostic for Status Type and Category?

Or we could sanitize the data first as it is added to the json file?