Development improvement: Explore possiblity of using Proxy of Base.prototype as Base.prototype

[medikoo]

/cc @kamsi @mtuchowski

More details on Proxy: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy

This will allow us to catch all access tries to undefined properties

Those are in most (likely: all) cases result of a bug (typo, or defined model not loaded as expected), and produces issues which are painful to debug (it usually takes a longer for developer to realize what produces unexpected behaviour)