add a worker module

src/worker.js

@@ -0,0 +1,15 @@
+import events from 'events';
+import Puid from 'puid';
+
+export default class Job extends events.EventEmitter {
+  constructor(queue, type, workerFn) {
+    if (typeof type !== 'string') throw new Error('Type must be a string');
+    if (typeof workerFn !== 'function') throw new Error('Worker must be a function');
+
+    super();
+    const puid = new Puid();
+    this.id = puid.generate();
+
+    // TODO: check for existing jobs to process
+  }
+}