Update to 2.3.1

Author: TheZoker

package-lock.json

@@ -3,9 +3,9 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "@jsonforms/core": "2.3.1-beta.0",
-    "@jsonforms/material-renderers": "2.3.1-beta.0",
-    "@jsonforms/react": "2.3.1-beta.0",
+    "@jsonforms/core": "2.3.1",
+    "@jsonforms/material-renderers": "2.3.1",
+    "@jsonforms/react": "2.3.1",
     "@material-ui/core": "^4.3.3",
     "@material-ui/icons": "^4.2.1",
     "@types/jest": "^24.0.18",