Error when try to build

[chespinoza]

Hi, I'm trying to build the lib but I'm getting this error:

> yarn build
yarn build v0.16.1
$ webpack -p --config build/webpack.min.conf.js
Hash: e2415a0aae97a1e511bb
Version: webpack 1.14.0
Time: 1823ms
           Asset     Size  Chunks             Chunk Names
vue-peity.min.js  12.3 kB       0  [emitted]  main
    + 7 hidden modules

ERROR in vue-peity.min.js from UglifyJs
SyntaxError: Unexpected token punc «(», expected punc «:» [./src/lib/bar.js:14,0]

ERROR in vue-peity.min.js from UglifyJs
SyntaxError: Unexpected token punc «(», expected punc «:» [./src/lib/bar.js:14,0]

The same occurs running the build with -> npm run-script build