Bump react-helmet from 5.2.1 to 6.0.0 in /client

Bumps [react-helmet](https://github.com/nfl/react-helmet) from 5.2.1 to 6.0.0.
- [Release notes](https://github.com/nfl/react-helmet/releases)
- [Changelog](https://github.com/nfl/react-helmet/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nfl/react-helmet/commits/6.0.0)

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

client/package-lock.json

@@ -19361,14 +19361,14 @@
       "integrity": "sha512-AjC7UOZMvygrWTc2hKxTDvlMXEtbmA0IgJjmkhgmQQ3RkXrWR11xEagLGFGaNyaPnmg24oaIiaNPnEoftUhfXA=="
     },
     "react-helmet": {
-      "version": "5.2.1",
-      "resolved": "https://registry.npmjs.org/react-helmet/-/react-helmet-5.2.1.tgz",
-      "integrity": "sha512-CnwD822LU8NDBnjCpZ4ySh8L6HYyngViTZLfBBb3NjtrpN8m49clH8hidHouq20I51Y6TpCTISCBbqiY5GamwA==",
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/react-helmet/-/react-helmet-6.0.0.tgz",
+      "integrity": "sha512-My6S4sa0uHN/IuVUn0HFmasW5xj9clTkB9qmMngscVycQ5vVG51Qp44BEvLJ4lixupTwDlU9qX1/sCrMN4AEPg==",
       "requires": {
         "object-assign": "^4.1.1",
-        "prop-types": "^15.5.4",
-        "react-fast-compare": "^2.0.2",
-        "react-side-effect": "^1.1.0"
+        "prop-types": "^15.7.2",
+        "react-fast-compare": "^2.0.4",
+        "react-side-effect": "^2.1.0"
       }
     },
     "react-is": {
@@ -19596,12 +19596,9 @@
       }
     },
     "react-side-effect": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/react-side-effect/-/react-side-effect-1.2.0.tgz",
-      "integrity": "sha512-v1ht1aHg5k/thv56DRcjw+WtojuuDHFUgGfc+bFHOWsF4ZK6C2V57DO0Or0GPsg6+LSTE0M6Ry/gfzhzSwbc5w==",
-      "requires": {
-        "shallowequal": "^1.0.1"
-      }
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/react-side-effect/-/react-side-effect-2.1.0.tgz",
+      "integrity": "sha512-IgmcegOSi5SNX+2Snh1vqmF0Vg/CbkycU9XZbOHJlZ6kMzTmi3yc254oB1WCkgA7OQtIAoLmcSFuHTc/tlcqXg=="
     },
     "react-transition-group": {
       "version": "4.3.0",
@@ -20755,11 +20752,6 @@
         }
       }
     },
-    "shallowequal": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/shallowequal/-/shallowequal-1.1.0.tgz",
-      "integrity": "sha512-y0m1JoUZSlPAjXVtPPW70aZWfIL/dSP7AFkRnniLCrK/8MDKog3TySTBmckD+RObVxH0v4Tox67+F14PdED2oQ=="
-    },
     "shebang-command": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-1.2.0.tgz",

client/package.json

@@ -36,7 +36,7 @@
     "react-dotdotdot": "^1.3.1",
     "react-dropzone": "^11.0.1",
     "react-ga": "^2.7.0",
-    "react-helmet": "^5.2.1",
+    "react-helmet": "^6.0.0",
     "react-markdown": "^4.3.1",
     "react-modal": "^3.11.2",
     "react-moment": "^0.9.7",