Bump moment from 2.26.0 to 2.28.0 in /client

Bumps [moment](https://github.com/moment/moment) from 2.26.0 to 2.28.0.
- [Release notes](https://github.com/moment/moment/releases)
- [Changelog](https://github.com/moment/moment/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/moment/moment/compare/2.26.0...2.28.0)

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

client/package-lock.json

@@ -15722,9 +15722,9 @@
       "integrity": "sha512-Yp4o3/ZA15wsXqJTT+R+9w2AYIkD1i80Lds47wDbuUhOvQvm+O2EfjFZSz0pMgZZSPHRhGxgcd2+GL4+jZMtdw=="
     },
     "moment": {
-      "version": "2.26.0",
-      "resolved": "https://registry.npmjs.org/moment/-/moment-2.26.0.tgz",
-      "integrity": "sha512-oIixUO+OamkUkwjhAVE18rAMfRJNsNe/Stid/gwHSOfHrOtw9EhAY2AHvdKZ/k/MggcYELFCJz/Sn2pL8b8JMw=="
+      "version": "2.28.0",
+      "resolved": "https://registry.npmjs.org/moment/-/moment-2.28.0.tgz",
+      "integrity": "sha512-Z5KOjYmnHyd/ukynmFd/WwyXHd7L4J9vTI/nn5Ap9AVUgaAE15VvQ9MOGmJJygEUklupqIrFnor/tjTwRU+tQw=="
     },
     "move-concurrently": {
       "version": "1.0.1",

client/package.json

@@ -25,7 +25,7 @@
     "history": "^4.10.1",
     "ipfs-http-client": "44.2.0",
     "is-url-superb": "^4.0.0",
-    "moment": "^2.26.0",
+    "moment": "^2.28.0",
     "node-sass": "^4.14.1",
     "query-string": "^6.13.1",
     "react": "^16.13.1",