fix(5): Add UMD build (#33)

.npmignore

@@ -0,0 +1,4 @@
+demo/
+umd/
+test/
+.travis.yml

README.md

@@ -5,7 +5,7 @@
 [![Coverage Status](https://coveralls.io/repos/github/ScottyFillups/key-controller/badge.svg?branch=master)](https://coveralls.io/github/ScottyFillups/key-controller?branch=master)
 [![install size](https://packagephobia.now.sh/badge?p=key-controller)](https://packagephobia.now.sh/result?p=key-controller)
 
-key-controller is a library that abstracts handling `keydown` and `keyup` events, making it easier to change keyboard controls dynamically.
+key-controller is a library that abstracts handling `keydown` and `keyup` events in the browser, making it easier to change keyboard controls dynamically.
 
 key-controller uses [KeyboardEvent.key](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key) for `controller.register(...)`. We recommend using https://keycode.info/ for looking up `.key` property of specific key's event.
 
@@ -15,6 +15,12 @@ key-controller uses [KeyboardEvent.key](https://developer.mozilla.org/en-US/docs
 npm install key-controller --save-dev
 ```
 
+If you don't use a module bundler, you can include the minified file:
+
+```html
+<script src="unpkg.com/key-controller/umd/key-controller.min.js" defer></script>
+```
+
 ## Concepts
 
 Keyboard controls usually map to an abstract action, eg. `Spacebar -> Jump`. To make a controller, you pass in generator function and a context:

package.json

@@ -9,6 +9,7 @@
     "fix": "standard --fix",
     "lint": "standard",
     "test": "standard && nyc ava",
+    "build": "parcel build --global KeyController --out-dir umd --out-file key-controller.min.js index.js",
     "coverage": "nyc report --reporter=text-lcov | coveralls",
     "demo": "parcel ./demo/index.html --open",
     "semantic-release": "semantic-release",