Add 'chain' method

example/incrementJob.js

@@ -1,13 +1,13 @@
 const LongLongJob = require('./LongLongJob');
-const { repeat, done } = require('../dist/');
+const { repeat, done, chain } = require('../dist/');
 
-const incrementJob = new LongLongJob('increment-job', [
+const incrementJob = new LongLongJob('increment-job', chain(
   async ({ value, threshold }) => {
     incrementJob.emit('tick', value);
     return value < threshold 
       ? repeat({ value: value + 1, threshold })
       : done({ value, threshold });
   },
-]);
+));
 
 module.exports = incrementJob;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "long-long-job",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": "Library for execution of long jobs with resume support.",
   "main": "dist/index.js",
   "engineStrict": true,

src/chain.js

@@ -0,0 +1,5 @@
+import { TaskUnit } from './types';
+
+export default function <S> (...tasks: TaskUnit<S>[]): TaskUnit<S>[] {
+  return tasks;
+}

src/index.js

@@ -1,6 +1,6 @@
 // @flow
 import { next, repeat, goto, label, done } from './helpers';
 import longLongJob from './LongLongJob';
+import chain from './chain';
 
-export { next, repeat, goto, label, done, longLongJob };
-
+export { next, repeat, goto, label, done, chain, longLongJob };