feat: upgrade mkdirp from 0.5.1 to 1.0.4

Snyk has created this PR to upgrade mkdirp from 0.5.1 to 1.0.4.

See this package in npm:
https://www.npmjs.com/package/mkdirp

See this project in Snyk:
https://app.snyk.io/org/contentstack-cli/project/48e01156-bda4-4b15-ae2f-09e8636b982c?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

package.json

@@ -12,7 +12,7 @@
     "commander": "2.9.0",
     "debug": "4.1.0",
     "lodash": "4.17.11",
-    "mkdirp": "0.5.1",
+    "mkdirp": "1.0.4",
     "ncp": "2.0.0",
     "prompt": "1.0.0",
     "request": "2.88.0",