✨ Added getTransaction function

[arimgibson]

Closes #16.

• Added getTransaction function
• Added getTransaction inline documentation

To-do before merging (will unmark as draft when ready)

• Add docs to readme
• Add testing

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[dawsbot]

I noticed in the diff that data was in the ethers response, but not essential-eth. Do you know how they go that in the response body? Was that two RPC requests that ethers made in-order to give that data back?

[arimgibson]

I think it's just a single request, but they do some processing after the transaction returns.

https://github.com/ethers-io/ethers.js/blob/ef1b28e958b50cea7ff44da43b3c5ff054e4b483/packages/providers/src.ts/formatter.ts#L318

[arimgibson]

I looked into this a little bit more; ethers returns as data while essential-eth returns as input. Both have the same value. Should I alter so that they both call it data?

[arimgibson]

Commit 9af489a fails testing locally as well. The testing is currently setup for the Transaction v to be a hex string; ethers currently turns into into a Number. Just wanted to commit what I had, and I'll let @dawsbot decide whether it should be a string or number