fix(deps): update dependency rxjs to v7

Author: renovate-bot

service/package.json

@@ -43,7 +43,7 @@
     "log4js": "6.3.0",
     "puppeteer": "7.1.0",
     "reflect-metadata": "0.1.13",
-    "rxjs": "6.6.7"
+    "rxjs": "7.2.0"
   },
   "devDependencies": {
     "@nestjs/cli": "7.6.0",