fix(chat) prevent homograph attacks

Decode URLs using punycode when rendering, so when http://ebаy.com is sent
we render http://xn--eby-7cd.com/ instead.

Ref: https://github.com/tasti/react-linkify/issues/84

package-lock.json

         }
       }
     },
+    "punycode": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
+      "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A=="
+    },
     "q": {
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/q/-/q-1.5.1.tgz",

package.json

     "moment-duration-format": "2.2.2",
     "olm": "https://packages.matrix.org/npm/olm/olm-3.1.4.tgz",
     "pixelmatch": "5.1.0",
+    "punycode": "2.1.1",
     "react": "16.9",
     "react-dom": "16.9",
     "react-emoji-render": "1.2.4",

react/features/base/react/components/native/Linkify.js

 // @flow
 
+import punycode from 'punycode';
 import React, { Component } from 'react';
 import ReactLinkify from 'react-linkify';
 import { Text } from 'react-native';
                 key = { key }
                 style = { this.props.linkStyle }
                 url = { decoratedHref }>
-                {decoratedText}
+                { punycode.toASCII(decoratedText) }
             </Link>
         );
     }

react/features/base/react/components/web/Linkify.js

 // @flow
 
+import punycode from 'punycode';
 import React, { Component } from 'react';
 import ReactLinkify from 'react-linkify';
 
                 key = { key }
                 rel = 'noopener noreferrer'
                 target = '_blank'>
-                {decoratedText}
+                { punycode.toASCII(decoratedText) }
             </a>
         );
     }