chore(deps): bump rxjs from 6.2.2 to 7.5.1

Bumps [rxjs](https://github.com/reactivex/rxjs) from 6.2.2 to 7.5.1.
- [Release notes](https://github.com/reactivex/rxjs/releases)
- [Changelog](https://github.com/ReactiveX/rxjs/blob/master/CHANGELOG.md)
- [Commits](ReactiveX/rxjs@6.2.2...7.5.1)

---
updated-dependencies:
- dependency-name: rxjs
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -8,7 +8,7 @@
     "local": "cross-env NODE_ENV=local node server",
     "nextdev": "cross-env NODE_ENV=dev next dev",
     "nextstart": "next-boost",
-    "nextstart2": "cross-env NODE_ENV=production next start",
+    "nextstart2": "cross-env NODE_ENV=production next start -p 3000",
     "ci": "cross-env NODE_ENV=ci node server",
     "server": "npm run clean && node server.js",
     "build": "next build",
@@ -20,7 +20,8 @@
     "serve": "cross-env NODE_ENV=production next start -p ${SERVE_PORT}",
     "serve.dev": "cross-env NODE_ENV=dev SERVE_PORT=${SERVE_PORT} node server",
     "serve.prod.old": "cross-env NODE_ENV=production SERVE_PORT=${SERVE_PORT} node server",
-    "serve.prod": "cross-env NODE_ENV=production next-boost -p ${SERVE_PORT}",
+    "serve.prod.boost": "cross-env NODE_ENV=production next-boost -p ${SERVE_PORT}",
+    "serve.prod": "cross-env NODE_ENV=production next start -p ${SERVE_PORT}",
     "dist": "next build && next export -o \"build\"",
     "start": "NODE_ENV=production node server.js",
     "clean": "shjs ./utils/scripts/clean.js",
@@ -101,6 +102,7 @@
     "react-calendar-heatmap": "1.8.1",
     "react-content-loader": "3.4.2",
     "react-copy-to-clipboard": "^5.0.3",
+    "react-device-detect": "^2.1.2",
     "react-dom": "17.0.2",
     "react-highlight-words": "^0.16.0",
     "react-lazy-load-image-component": "1.5.0",
@@ -123,7 +125,7 @@
     "remarkable-mentions": "^0.1.0",
     "resize-observer-polyfill": "^1.5.1",
     "response-time": "^2.3.2",
-    "rxjs": "6.2.2",
+    "rxjs": "7.5.1",
     "sanitize-html": "^2.5.2",
     "scroll-into-view-if-needed": "1.5.0",
     "sentry-testkit": "^2.1.0",