Update to latest PSReadLine beta (with fix for race condition)

Author: andyleejordan

modules.json

@@ -6,6 +6,7 @@
         "Version": "1.1.3"
     },
     "PSReadLine": {
-        "Version": "2.2.3"
+        "AllowPrerelease": true,
+        "Version": "2.2.4-beta1"
     }
 }