Add a fuzz harness for Select

[edznux-dd]

This is a possible implementation of the fuzzing addition proposal: #206

It contains a few trade of specific to the implementation, thus the split between the proposal of fuzzing in general and this proposal of implementation.

This implementation relies heavily on reflection, which as an upfront cost for the review, but should allow for evolution of the code base (additional method, change of types etc...)

Caveat:

• It only implement Select fuzzing, but it should be not too difficult to implement other query types.
• The amount of byte consumed is hardcoded to 16 (argData := state.consumeData(16)), but should be a range from 1 to many (boolean to long string) to be both more efficient on small types and test more edge cases.

An alternative implementation could be done with direct method calls. Making chain would be more difficult as far as I can tell, but that's up to you :)

thanks!

[coveralls]

coverage: 96.527%. remained the same
when pulling 704f648 on edznux-dd:add-fuzzer
into 746784b on huandu:master.

[huandu]

LGTM. Thanks for your contribution!