feat: use webcrypto in favor of node-forge

BREAKING CHANGE: generateKeyPair is now async

test/hmac.spec.js

@@ -0,0 +1,24 @@
+/* eslint max-nested-callbacks: ["error", 8] */
+/* eslint-env mocha */
+'use strict'
+
+const expect = require('chai').expect
+const crypto = require('../src')
+
+const hashes = ['SHA1', 'SHA256', 'SHA512']
+
+describe('HMAC', () => {
+  hashes.forEach((hash) => {
+    it(`${hash} - sign and verify`, (done) => {
+      crypto.hmac.create(hash, new Buffer('secret'), (err, hmac) => {
+        expect(err).to.not.exist
+
+        hmac.digest(new Buffer('hello world'), (err, sig) => {
+          expect(err).to.not.exist
+          expect(sig).to.have.length(hmac.length)
+          done()
+        })
+      })
+    })
+  })
+})