feat: upgrade multiple dependencies with Snyk

Snyk has created this PR to upgrade:
  - @tensorflow/tfjs-converter from 3.12.0 to 4.20.0.
    See this package in npm: https://www.npmjs.com/package/@tensorflow/tfjs-converter
  - @tensorflow/tfjs-core from 3.11.0 to 4.20.0.
    See this package in npm: https://www.npmjs.com/package/@tensorflow/tfjs-core

See this project in Snyk:
https://app.snyk.io/org/aravindvnair99-github-marketplace/project/3e229b24-b2de-4c21-9d58-eebf425f44fc?utm_source=github&utm_medium=referral&page=upgrade-pr

functions/package.json

@@ -25,8 +25,8 @@
 	},
 	"dependencies": {
 		"@tensorflow/tfjs-automl": "^1.3.0",
-		"@tensorflow/tfjs-converter": "^3.12.0",
-		"@tensorflow/tfjs-core": "^3.11.0",
+		"@tensorflow/tfjs-converter": "^4.20.0",
+		"@tensorflow/tfjs-core": "^4.20.0",
 		"@tensorflow/tfjs-node": "^3.14.0",
 		"axios": "^0.25.0",
 		"busboy": "^0.3.1",