Add TypeScript definitions

.editorconfig

@@ -0,0 +1,11 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+
+indent_style = space
+indent_size = 2
+
+trim_trailing_whitespace = true
+insert_final_newline = true

.github/workflows/build.yml

@@ -0,0 +1,13 @@
+name: build
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v2
+      with:
+        node-version: 14.x
+        check-latest: true
+    - run: npm install
+    - run: npm test

README.md

@@ -1,13 +1,13 @@
 [![NPM version](https://img.shields.io/npm/v/prottle.svg?style=flat-square)](https://www.npmjs.com/package/prottle)
-[![Build Status](https://travis-ci.org/zewish/prottle.svg?branch=master)](https://travis-ci.org/zewish/prottle)
+[![Build Status](https://github.com/zewish/prottle/workflows/build/badge.svg)](https://github.com/zewish/prottle/actions?query=workflow%3Abuild)
 [![Downloads](https://img.shields.io/npm/dm/prottle.svg?style=flat-square)](https://www.npmjs.com/package/prottle)
 
 Promise.all() throttle - Prottle
 
 - Executes promise-returning functions in batches;
 - Once batch 1 is finished it's time for the next one;
 - Backend - Node 4.0+ supported;
-- Frontend - works with ES2015 preset using babelify. Use a Promise polyfill for IE.
+- Frontend - works with the env preset using babel. Use a Promise polyfill for IE.
 
 Installation
 ------------
@@ -18,54 +18,51 @@ $ npm install prottle --save
 Example - resolved
 ------------------
 ```js
-'use strict';
-let prottle = require('prottle');
+const prottle = require('prottle');
 
 prottle(2, [
-    // batch 1
-    () => Promise.resolve(1)
-    , () => Promise.resolve(2)
-    // batch 2
-    , () => Promise.resolve(3)
-    , () => new Promise((resolve, reject) => {
-        setTimeout(() => resolve(4), 3000);
-    })
-    // batch 3
-    , () => Promise.resolve(5)
+  // batch 1
+  () => Promise.resolve(1),
+  () => Promise.resolve(2),
+  // batch 2
+  () => Promise.resolve(3),
+  () => new Promise((resolve, reject) => {
+    setTimeout(() => resolve(4), 3000);
+  }),
+  // batch 3
+  () => Promise.resolve(5),
 ])
-.then(res => {
+  .then(res => {
     console.log(res); // [ 1, 2, 3, 4, 5 ]
-});
+  });
 ```
 
 Example - rejected
 ------------------
 ```js
-'use strict';
-let prottle = require('prottle');
+const prottle = require('prottle');
 
 prottle(2, [
-    () => Promise.resolve('yay')
-    , () => Promise.reject('beep boop')
-    , () => Promise.resolve('wow')
+  () => Promise.resolve('yay'),
+  () => Promise.reject('beep boop'),
+  () => Promise.resolve('wow')
 ])
-.catch(err => {
+  .catch(err => {
     console.log(err); // beep boop
-});
+  });
 ```
 
 Works with returned values too!
 -------------------------------
 ```js
-'use strict';
-let prottle = require('prottle');
+const prottle = require('prottle');
 
 prottle(2, [
-    () => 1
-    , () => 2
-    , () => 3
+  () => 1,
+  () => 2,
+  () => 3
 ])
-.then(res => {
+  .then(res => {
     console.log(res); // [ 1, 2, 3 ]
-});
-```
+  });
+```