Support vars whose type is Dictionary, e.g. var map: [SomeStruct: Int]

[entonio]

Currently, if there are members whose type is a dictionary, they will be ignored by the decoder code generator (not by the CodingKeys nor by the encoder), e.g. :

var eatenByFruit: [Fruit: Int]

will have a corrresponding CodingKey, will be present in the encoder body, but skipped by the decoder.

I think this too requires support in SimpleCodableMacro.swift:59-93, but I'm not sure what needs to be done.

[entonio]

(As in the previous issue, I ended up copying the generated code and completing it. This macro is a true gift!)