Deprecate npm package

[jimmywarting]

I think it have come to a time where we no longer need Safe-Buffer in modern day codes
Think the npm package should be deprecated

Encourage ppl to use Uint8Array, TextEncoder, DataView instead 😉

[Rudxain]

I agree. This is both good and bad news.

After full deprecation, the repo should be archived

[Ucok23]

Not yet possible since many project still depends on it, like express