Update _package.json

I made this change in the hope of fixing this error:

Error: Cannot find module '/home/tim/Documents/MyWebPages/arwd/projects/tmp/node_modules/hoodie-app/bin/start'
    at Function.Module._resolveFilename (module.js:338:15)
    at Function.Module._load (module.js:280:25)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:901:3