Fix broken React unmount because of non-existing view on unmount (#6284)

* fixed a bug with the React EditorContent component on unmount when editor view not available

* added changeset

.changeset/shaggy-hats-rescue.md

@@ -0,0 +1,5 @@
+---
+'@tiptap/react': patch
+---
+
+Fixed a bug in the EditorContent component that caused a crash in Firefox based browsers because of the editor view not being available when an uninitialized editor is unmounted (for example via Strict mode)

packages/react/src/EditorContent.tsx

@@ -164,10 +164,14 @@ export class PureEditorContent extends React.Component<
 
     this.initialized = false
 
-    if (!editor.isDestroyed) {
-      editor.view.setProps({
-        nodeViews: {},
-      })
+    try {
+      if (!editor.isDestroyed) {
+        editor.view.setProps({
+          nodeViews: {},
+        })
+      }
+    } catch {
+      // ignore error as we can't set props on a non-existing view
     }
 
     if (this.unsubscribeToContentComponent) {