fix: email pkg tsconfig to encompass .ts(x) files (#660)

Author: karelvuong

packages/email/tsconfig.json

@@ -3,6 +3,6 @@
   "compilerOptions": {
     "baseUrl": "."
   },
-  "include": ["./*.ts", "./*.tsx"],
+  "include": ["./**/*.ts", "./**/*.tsx"],
   "exclude": ["node_modules"]
 }