Add proxy-polyfill to make tiptap work with IE11

Signed-off-by: Julius Härtl <jus@bitgrid.net>

Author: juliusknorr

package-lock.json

@@ -41,6 +41,7 @@
 		"prosemirror-transform": "^1.2.4",
 		"prosemirror-utils": "^0.9.6",
 		"prosemirror-view": "^1.14.6",
+		"proxy-polyfill": "^0.3.1",
 		"tiptap": "^1.27.0",
 		"tiptap-commands": "^1.13.0",
 		"tiptap-extensions": "^1.29.0",

package.json

@@ -39,6 +39,8 @@ import { Image, PlainTextDocument, ListItem } from './nodes'
 import MarkdownIt from 'markdown-it'
 import taskLists from 'markdown-it-task-lists'
 
+import 'proxy-polyfill'
+
 import { MarkdownSerializer, defaultMarkdownSerializer } from 'prosemirror-markdown'
 
 const loadSyntaxHighlight = async(language) => {

src/EditorFactory.js

@@ -47,7 +47,7 @@ module.exports = {
 			{
 				test: /\.js$/,
 				loader: 'babel-loader',
-				exclude: /node_modules/
+				exclude: /node_modules(?!(\/|\\)(proxy-polyfill)(\/|\\))/,
 			},
 			{
 				test: /\.(png|jpg|gif|svg)$/,