chore: update bridge and add padding to demo

Author: satazor

demo/package-lock.json

@@ -4,7 +4,7 @@
   "private": true,
   "dependencies": {
     "@material-ui/core": "^4.0.2",
-    "idm-bridge-postmsg": "^0.3.1",
+    "idm-bridge-postmsg": "^0.3.2",
     "idm-client": "file:..",
     "prop-types": "^15.7.2",
     "react": "^16.8.6",

demo/package.json

@@ -6,9 +6,11 @@
 
 .App-loading,
 .App-error {
+    padding:  20px;
     display: flex;
     flex-direction: column;
     flex: 1 0 auto;
     justify-content: center;
     align-items: center;
+    text-align: center;
 }