fix: upgrade winston from 3.17.0 to 3.18.3

Snyk has created this PR to upgrade winston from 3.17.0 to 3.18.3.

See this package in npm:
winston

See this project in Snyk:
https://app.snyk.io/org/contentstack-devex/project/5fa50751-dadd-42e3-8abb-5c787d6308a8?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -18,7 +18,7 @@
     "mkdirp": "^1.0.4",
     "progress-stream": "^2.0.0",
     "promise-limit": "^2.7.0",
-    "winston": "^3.17.0"
+    "winston": "^3.18.3"
   },
   "devDependencies": {
     "@contentstack/cli-dev-dependencies": "~1.3.1",