[Snyk] Upgrade rxjs from 6.3.3 to 6.6.7#3

security-api wants to merge 1 commit intomasterchequer-io/rxjs-grpc:masterfrom

snyk-upgrade-b6f6a1ac675d0d061b1e898d1d3b0b1cchequer-io/rxjs-grpc:snyk-upgrade-b6f6a1ac675d0d061b1e898d1d3b0b1cCopy head branch name to clipboard