fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AXIOS-1038255

Author: snyk-bot

package-lock.json

@@ -17,7 +17,7 @@
     "@oclif/plugin-help": "^2.2.3",
     "@oclif/plugin-warn-if-update-available": "^1.7.0",
     "avsc": "^5.5.1",
-    "axios": "^0.20.0",
+    "axios": "^0.21.1",
     "chalk": "^3.0.0",
     "codecov": "^3.8.0",
     "crypto-js": "^4.0.0",