[Snyk] Upgrade rxjs from 6.4.0 to 6.6.3#82

Nolanus wants to merge 1 commit intomasterNolanus/ngx-multi-window:masterfrom

snyk-upgrade-a2ecc6e545f109016efe9e9287a0c0a4Nolanus/ngx-multi-window:snyk-upgrade-a2ecc6e545f109016efe9e9287a0c0a4Copy head branch name to clipboard