feat: upgrade @oclif/core from 2.15.0 to 3.0.2

Snyk has created this PR to upgrade @oclif/core from 2.15.0 to 3.0.2.

See this package in npm:
https://www.npmjs.com/package/@oclif/core

See this project in Snyk:
https://app.snyk.io/org/contentstack-cli/project/07e52a09-4ee0-4d45-954a-cd483d9f2826?utm_source=github&utm_medium=referral&page=upgrade-pr

packages/contentstack-import/package.json

@@ -8,7 +8,7 @@
     "@contentstack/cli-command": "~1.2.14",
     "@contentstack/cli-utilities": "~1.5.4",
     "@contentstack/management": "~1.10.2",
-    "@oclif/core": "^2.9.3",
+    "@oclif/core": "^3.0.2",
     "big-json": "^3.2.0",
     "bluebird": "^3.7.2",
     "chalk": "^4.1.2",