Reverts TSConfig due to build error :-(

Author: JudahGabriel

Chavah.NetCore/tsconfig.json

@@ -5,7 +5,7 @@
     "removeComments": false,
     "sourceMap": true,
     "watch": false,
-    "target": "es6",
+    "target": "es5",
     "lib": [ "dom", "es2018", "scripthost", "es2015.promise" ],
     "noEmitHelpers": true,
     "strictNullChecks": true,