Add node modules and new code for release (#57)

Co-authored-by: taakleton <taakleton@users.noreply.github.com>

node_modules/p-each-series/readme.md

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+# p-each-series [![Build Status](https://travis-ci.com/sindresorhus/p-each-series.svg?branch=master)](https://travis-ci.com/github/sindresorhus/p-each-series)
+
+> Iterate over promises serially
+
+Useful as a side-effect iterator. Prefer [`p-map`](https://github.com/sindresorhus/p-map) if you don't need side-effects, as it's concurrent.
+
+## Install
+
+```
+$ npm install p-each-series
+```
+
+## Usage
+
+```js
+const pEachSeries = require('p-each-series');
+
+const keywords = [
+	getTopKeyword(), //=> Promise
+	'rainbow',
+	'pony'
+];
+
+const iterator = async element => saveToDiskPromise(element);
+
+(async () => {
+	console.log(await pEachSeries(keywords, iterator));
+	//=> ['unicorn', 'rainbow', 'pony']
+})();
+```
+
+## API
+
+### pEachSeries(input, iterator)
+
+Returns a `Promise` that is fulfilled when all promises in `input` and ones returned from `iterator` are fulfilled, or rejects if any of the promises reject. The fulfillment value is the original `input`.
+
+#### input
+
+Type: `Iterable<Promise | unknown>`
+
+Iterated over serially in the `iterator` function.
+
+#### iterator(element, index)
+
+Type: `Function`
+
+Return value is ignored unless it's `Promise`, then it's awaited before continuing with the next iteration.
+
+### pEachSeries.stop
+
+Stop iterating through items by returning `pEachSeries.stop` from the iterator function.
+
+```js
+const pEachSeries = require('p-each-series');
+
+// Logs `a` and `b`.
+const result = await pEachSeries(['a', 'b', 'c'], value => {
+	console.log(value);
+
+	if (value === 'b') {
+		return pEachSeries.stop;
+	}
+});
+
+console.log(result);
+//=> ['a', 'b', 'c']
+```
+
+## Related
+
+- [p-map-series](https://github.com/sindresorhus/p-map-series) - Map over promises serially
+- [p-series](https://github.com/sindresorhus/p-series) - Run promise-returning & async functions in series
+- [p-pipe](https://github.com/sindresorhus/p-pipe) - Compose promise-returning & async functions into a reusable pipeline
+- [p-waterfall](https://github.com/sindresorhus/p-waterfall) - Run promise-returning & async functions in series, each passing its result to the next
+- [p-reduce](https://github.com/sindresorhus/p-reduce) - Reduce a list of values using promises into a promise for a value
+- [p-map](https://github.com/sindresorhus/p-map) - Map over promises concurrently
+- [More…](https://github.com/sindresorhus/promise-fun)