Chore: Remove ABI from schema package

[cbrzn]

closes #973

• use undefined instead of null in abi to losslessly save space while encoding to msgpack.
• replace Abi from schema parse with WrapAbi from wrap manifest.
• fix a bug in msgpack binding where it sometimes adds an extra 130 in Uint8Array buffer.

[cbrzn]

If I understand things correctly the change of null to undefined is an improvement of the current structure, right? If that's the case, I would suggest tackling this in two steps, the first entirely removing the Abi definition from schema/parse and then making these improvements - What do you think ser @Niraj-Kamdar

edit: it's worth mentioning that I will follow your lead on this since you're more experienced with this part of the code Niraj, I am just making a suggestion, so feel free to ignore it :P

[Niraj-Kamdar]

@cbrzn We could have but I already finished 1/3 of the work

[cbrzn]

@cbrzn We could have but I already finished 1/3 of the work

perfect, go for it then bro

[cbrzn]

🔥 you rock Niraj - Thanks for pushing this forward

[dOrgJelli]

@cbrzn can you please disable auto formatting, it bloats the size of PRs and makes it difficult to identify where changes have occurred that are not just styling changes.

[dOrgJelli]

These changes should technically be going into a new version of the schema. Since no breaking changes are being made (if I'm correct) the version would be 0.2.

Since this work is fixing things that should have been done before origin release, we can slide these changes in unnoticed right now IMO, but this should be the last time we do something like this.