refactor(types-test): reformat and add tests for decoder
refactor(types-test): reformat and add tests for decoder

This format for the types test makes it a lot easier to read whats
actually being tested, as well as being easier to compare to the
actual spec. Decoding tests were filled out per the spec and what
decoders are currently implemented. More complete Encoding tests
are to follow

robblovell/node-amqp10,noodlefrenzy/node-amqp10,danlangford/node-amqp10,mbroadst/node-amqp10