Add explicit exclude

See https://www.typescriptlang.org/docs/handbook/tsconfig-json.html

This should make jenkins work again.

Author: pluma

tsconfig.json

@@ -25,5 +25,9 @@
     "strictFunctionTypes": true,
     "strictNullChecks": true,
     "target": "es2016"
-  }
+  },
+  "exclude": [
+    "node_modules",
+    "output"
+  ]
 }