message: Remove unused variable 'extractable'.
  Reference module.exports directly for hard-coded public and private keys.
diff: module.exports.ECC_PUBKEY_ID = ECC_PUBKEY_ID;
  (function() {
  - var extractable = true;
  var _algo = WebCryptoAlgorithm.ECDSA_SHA256;
  _algo['namedCurve'] = ECDSA_KEYPAIR.publicKeyJSON['crv'];
  PublicKey.import(ECDSA_KEYPAIR.publicKeyJSON, _algo, WebCryptoUsage.VERIFY, KeyFormat.JWK, {
  result: function (pubkey) {
  - ECC_PUBKEY = MockEccAuthenticationFactory.ECC_PUBKEY = pubkey;
  + ECC_PUBKEY = module.exports.ECC_PUBKEY = pubkey;
  keysDefined.signalAll();
  },
  error: function(e) {
  });
  PrivateKey.import(ECDSA_KEYPAIR.privateKeyJSON, _algo, WebCryptoUsage.SIGN, KeyFormat.JWK, {
  result: function (privkey) {
  - ECC_PRIVKEY = MockEccAuthenticationFactory.ECC_PRIVKEY = privkey;
  + ECC_PRIVKEY = module.exports.ECC_PRIVKEY = privkey;
  keysDefined.signalAll();
  },
  error: function(e) {
  