[package.json] downgrading msal to default stable version 1.0.0 (#104)

Author: vogtn

package.json

@@ -50,7 +50,7 @@
     "@microsoft/microsoft-graph-types": "^1.8.0",
     "@microsoft/microsoft-graph-types-beta": "microsoftgraph/msgraph-typescript-typings#beta",
     "lit-element": "^2.1.0",
-    "msal": "^1.0.0",
+    "msal": "1.0.0",
     "office-ui-fabric-core": "10.0.0"
   },
   "devDependencies": {