readme example fails on install

[hierophantos]

bin/trust claim \                                                    
  --creator did:00a65b11-593c-4a46-bf64-8b83f3ef698f \
  --target did:59f269a0-0847-4f00-8c4c-26d84e6714c4 \
  --description 'Elixir programming' \
  --value 0.99 \
  --tags 'programming, Elixir' \
  --algorithm EcdsaKoblitzSignature2016 \
  --private-key L4mEi7eEdTNNFQEWaa7JhUKAbtHdVvByGAqvpJKC53mfiqunjBjw
/Volumes/Transcend/dev/projects/js-trustgraph-cli/src/cli/actions.js:66
      var trust = new _trustgraph2.default();
                  ^

TypeError: _trustgraph2.default is not a constructor
    at Actions.exec (/Volumes/Transcend/dev/projects/js-trustgraph-cli/src/cli/acti
ons.js:41:19)                                                                     
    at Object.<anonymous> (/Volumes/Transcend/dev/projects/js-trustgraph-cli/bin/tr
ust-claim:5:9)                                                                    
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.runMain (module.js:604:10)
    at run (bootstrap_node.js:393:7)
    at startup (bootstrap_node.js:150:9)