chore: Upgrade all of prosemirror (#5366)

Co-authored-by: Apoorv Mishra <apoorvmishra101092@gmail.com>

shared/editor/commands/backspaceToParagraph.ts

@@ -1,6 +1,5 @@
 import { NodeType } from "prosemirror-model";
-import { EditorState } from "prosemirror-state";
-import { Dispatch } from "../types";
+import { Command } from "prosemirror-state";
 
 /**
  * Converts the current node to a paragraph when pressing backspace at the
@@ -9,28 +8,28 @@ import { Dispatch } from "../types";
  * @param type The node type
  * @returns A prosemirror command.
  */
-export default function backspaceToParagraph(type: NodeType) {
-  return (state: EditorState, dispatch: Dispatch) => {
+export default function backspaceToParagraph(type: NodeType): Command {
+  return (state, dispatch) => {
     const { $from, from, to, empty } = state.selection;
 
     // if the selection has anything in it then use standard delete behavior
     if (!empty) {
-      return null;
+      return false;
     }
 
     // check we're in a matching node
     if ($from.parent.type !== type) {
-      return null;
+      return false;
     }
 
     // check if we're at the beginning of the heading
     const $pos = state.doc.resolve(from - 1);
     if ($pos.parent === $from.parent) {
-      return null;
+      return false;
     }
 
     // okay, replace it with a paragraph
-    dispatch(
+    dispatch?.(
       state.tr
         .setBlockType(from, to, type.schema.nodes.paragraph)
         .scrollIntoView()