index: validate `name` in package.json

lib/index.js

@@ -44,6 +44,12 @@ export default class Now extends EventEmitter {
       throw e;
     }
 
+    if (null == pkg.name || 'string' !== typeof pkg.name) {
+      const e = Error('Missing or invalid `name` in `package.json`.');
+      e.userError = true;
+      throw e;
+    }
+
     if (!pkg.scripts || !pkg.scripts.start) {
       const e = Error('Missing `start` script in `package.json`. ' +
         'See: https://docs.npmjs.com/cli/start.');