Creating SINs was broken due to not calling the parent constructor, shich sets
"converts" and "_encoding". I've fixed the problem and added tests that reveal
the error.
EncodedData was setting "converter" and "_encoding" by setting them on the
prototype of the object. This was probably done to enable overriding these
functions. However, overriding was never actually used anywhere, and setting
the __proto__ is deprecated. So I have remove all instances of setting
__proto__ for EncodedData-ish classes, and instead just set "convert" and
"_encoding" on the object directly.
Ryan X. Charles
Linus Unnebäck
Manuel Araoz
Eric Martindale