Research enumify etc for native solution

[ephetic]

Frozen objects and getters that throw could do a lot of the same. Could be grepable with a definition syntax that enforced symmetry between definition and reference:

const cc = require('@ephetic/checked-constants')
cc.foo.bar.somekey = 111

where cleverness in cc allows the chain of previously undefined namespaces to be created. Would need a way to prevent grabbing object references at partial/parent paths of valid namespaces that are not themselves valid namespaces (e.g. cc.foo in previous). Would need way to keep cc extensible without namespaces being mutable, akin to #5.