Document workaround for using with webpack [skip ci] (#104)

README.md

@@ -60,6 +60,7 @@ Once installed, import it in your application:
 ```html
 <link rel="import" href="bower_components/vaadin-rich-text-editor/vaadin-rich-text-editor.html">
 ```
+
 ### Polymer 3 and ES Modules compatible version
 
 
@@ -75,6 +76,30 @@ Once installed, import it in your application:
 import '@vaadin/vaadin-rich-text-editor/vaadin-rich-text-editor.js';
 ```
 
+### Bundling with webpack
+
+When using `webpack` to bundle the application, do the following steps:
+
+1. Install the loader:
+
+```sh
+npm install expose-loader --save-dev
+```
+
+2. Add these lines to the webpack config:
+```
+module: {
+  rules: [
+  ...
+  {
+    test: require.resolve('@vaadin/vaadin-rich-text-editor/vendor/vaadin-quill.js'),
+    use: [{
+      loader: 'expose-loader',
+      options: 'Quill'
+    }]
+  }
+```
+
 ## Getting started
 
 Vaadin components use the Lumo theme by default.