fix: add node in root tsconfig.json types

Fixes build failure issues with mocha vs jest
Refs: https://www.labeightyfour.com/2019/05/17/compiler-errors-with-mocha-and-typescript/

Author: trivikr

tsconfig.json

@@ -17,7 +17,8 @@
     "preserveConstEnums": true,
     "removeComments": true,
     "resolveJsonModule": true,
-    "target": "es5"
+    "target": "es5",
+    "types": ["node"]
   },
   "include": ["packages/", "lib/"],
   "exclude": ["node_modules/", "**/*.spec.ts"]