Update dependency gridstack to ^8.4.0

package.json

@@ -145,7 +145,7 @@
     "gettext-parser": "^6.0.0",
     "graphql": "^15.7.2",
     "graphql-tag": "^2.11.0",
-    "gridstack": "^8.3.0",
+    "gridstack": "^8.4.0",
     "highlight.js": "^11.8.0",
     "immer": "^9.0.15",
     "ipaddr.js": "^1.9.1",

yarn.lock

@@ -6746,10 +6746,10 @@ graphql@^15.7.2:
   resolved "https://registry.yarnpkg.com/graphql/-/graphql-15.7.2.tgz#85ab0eeb83722977151b3feb4d631b5f2ab287ef"
   integrity sha512-AnnKk7hFQFmU/2I9YSQf3xw44ctnSFCfp3zE0N6W174gqe9fWG/2rKaKxROK7CcI3XtERpjEKFqts8o319Kf7A==
-gridstack@^8.3.0:
-  version "8.3.0"
-  resolved "https://registry.yarnpkg.com/gridstack/-/gridstack-8.3.0.tgz#4c79f8b8c4cffeb3664266108e38ed91b3d0f7b4"
-  integrity sha512-RcL2xskAYKOpakvpSwHdKheG7C7YgNY7777C5m+T1JMjSgcmEc3qPBM573l0NuyjMz4Errx1/3p+rMgUfF4+mw==
+gridstack@^8.4.0:
+  version "8.4.0"
+  resolved "https://registry.yarnpkg.com/gridstack/-/gridstack-8.4.0.tgz#7af49159f9dc144c89a2c56246e1710406f75fcf"
+  integrity sha512-qLJuJrBy9bbG3hI+h2cEhiuZ51J3MyEMmv5AXg7MCFiBeG8A4HyIUytueqtD/oZcA3Pccq2Xoj7GrwpmKOS3ig==
 gzip-size@^6.0.0:
   version "6.0.0"