fix: Downgrade dotenv to v16 to suppress promotional messages

dotenv 17.x includes promotional stderr output that clutters CLI output.
Downgraded to 16.x which provides the same functionality without
the promotional messages.

Author: JakeSCahill

package-lock.json

@@ -103,7 +103,7 @@
     "chalk": "4.1.2",
     "cheerio": "^1.1.2",
     "commander": "^14.0.0",
-    "dotenv": "^17.2.3",
+    "dotenv": "^16.6.1",
     "glob": "^11.0.0",
     "gulp": "^4.0.2",
     "gulp-connect": "^5.7.0",