fix: add buffer, cleanup, reduce size (#170)

* fix: add buffer, cleanup, reduce size

- add buffer related to https://github.com/ipfs/js-ipfs/issues/2924
- remove unnecessary eslint ignore
- remove tweelnacl and use node-forge
- remove browserify-aes  and use node-forge
- use multibase to encode b58
- require only sha256 from multihashing
- reduce bundle size

after all the deps here https://github.com/ipfs/js-ipfs/issues/2924 are merged libp2p-crypto will be able to be bundle with `node: false` 🎉

* fix: reduce bundle size

* fix: use new secp

* fix: bundle size

* chore: update secp

Co-Authored-By: Jacob Heun <jacobheun@gmail.com>

Co-authored-by: Jacob Heun <jacobheun@gmail.com>

test/util.spec.js

@@ -3,6 +3,7 @@
 'use strict'
 
 const chai = require('chai')
+const { Buffer } = require('buffer')
 const dirtyChai = require('dirty-chai')
 const expect = chai.expect
 chai.use(dirtyChai)