add jest.config to ts config

Author: nhsd-david-wass

internal/events/tsconfig.json

@@ -14,6 +14,7 @@
   "extends": "../../tsconfig.base.json",
   "include": [
     "src/**/*",
-    "package.json"
+    "package.json",
+    "jest.config.ts"
   ]
 }