Rewrite iOS with swift

[saeedkargosha]

1-rewrite all function iOS with swift
2-add function for generating EC
3-add function for generating CSR
4-add function for getting PublicKey with DER
5-export Constance ECDSA algorithm

[amitaymolko]

Hey @saeedkargosha
Thanks for this!
Does this PR close #69 ?

[saeedkargosha]

you're welcome
Yeah.

[Ben305]

👍

@amitaymolko Any chance to get this merged and released soon?

[amitaymolko]

Hey Ben,

I have tested this PR and it seems to be working well.
This PR increases the minimal React Native version so I'm considering releasing it as a new major version to not affect current users of the lib.
I'm aware that this PR also fixes known issues with newer RN versions.
I will do my best to get to this ASAP.

Cheers

P.S accidentally closed the PR, reopened

[Ben305]

A new major version would be perfectly fine, I‘d like to use this package for a new app based on RN 0.62.

[amitaymolko]

merging into a branch to fix the example project and docs, and then I will release a version

[amitaymolko]

After fixing the example project and 2 small issues I've released this under v2.0.0

[Ben305]

Thank you @amitaymolko