Migrate to Typescript

[ansermino]

There seems to be some good discussion around this in the ethereumjs organization, as well as other JS blockchain projects. There is an additional barrier of entry, but it would seem that the benefits are worth it. We would have a huge advantage by making the switch now, although it would certainly could be reconsidered further down the road.

ethereumjs/organization#28
ethereumjs/ethereumjs-client#10
https://www.typescriptlang.org/docs/handbook/migrating-from-javascript.html

[GregTheGreek]

Love the idea. Let's make a typescript branch.

[dbkbali]

Definitely will improve code quality and typescript transpiles to js. So everyone should be happy😁

[priom]

Let's migrate the whole project to TS, will be easier to maintain the project and releases.

[GregTheGreek]

After having a call with the Ethereum-js /shasper-js team I think it would be best to migrate to typescript. Moving to high priority before the project gets too large.

[GregTheGreek]

Update:

New milestone & project setup for this. Currently #34 is being worked on by me to get the core/state directory converted. Will move outwards.