[Snyk] Security upgrade @google-cloud/firestore from 0.19.0 to 4.0.0#267

snyk-bot wants to merge 1 commit intomasterleejh3224/nodejs-docs-samples:masterfrom

snyk-fix-a307208ef93d932a1dd35285faa1cd2bleejh3224/nodejs-docs-samples:snyk-fix-a307208ef93d932a1dd35285faa1cd2bCopy head branch name to clipboard