ws-bower failed when the dependency tree is huge

[predix-edgemanager-ui]

We get the following error when our bower dependencies increase. I forked this repo and changed the shell.js version then I am getting a different error in an other function. We can provide more information for debugging.

}, shell.js: internal error
Error: "toString()" failed
    at Buffer.toString (buffer.js:496:11)
    at Object.fs.readFileSync (fs.js:553:33)
    at updateStdout (/Users/212317453/Documents/IntelliJWorkspace/bower-plugin/node_modules/shelljs/src/exec.js:30:28)
    at execSync (/Users/212317453/Documents/IntelliJWorkspace/bower-plugin/node_modules/shelljs/src/exec.js:67:38)
    at Object._exec (/Users/212317453/Documents/IntelliJWorkspace/bower-plugin/node_modules/shelljs/src/exec.js:179:12)
    at Object.exec (/Users/212317453/Documents/IntelliJWorkspace/bower-plugin/node_modules/shelljs/src/common.js:182:23)
    at Object.<anonymous> (/Users/212317453/Documents/IntelliJWorkspace/bower-plugin/bin/ws-bower.js:151:21)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)