chore: fix test

Author: nperez0111

packages/core/src/extensions/Collaboration/ForkYDocPlugin.test.ts

@@ -36,7 +36,7 @@ it("can fork a document", async () => {
     "__snapshots__/fork-yjs-snap-editor.json",
   );
 
-  editor.forkYDocPlugin.fork();
+  editor.forkYDocPlugin!.fork();
 
   editor.replaceBlocks(editor.document, [
     {
@@ -83,7 +83,7 @@ it("can merge a document", async () => {
     "__snapshots__/fork-yjs-snap-editor.json",
   );
 
-  editor.forkYDocPlugin.fork();
+  editor.forkYDocPlugin!.fork();
 
   editor.replaceBlocks(editor.document, [
     {
@@ -99,7 +99,7 @@ it("can merge a document", async () => {
     "__snapshots__/fork-yjs-snap-editor-forked.json",
   );
 
-  editor.forkYDocPlugin.merge({ keepChanges: false });
+  editor.forkYDocPlugin!.merge({ keepChanges: false });
 
   await expect(fragment.toJSON()).toMatchFileSnapshot(
     "__snapshots__/fork-yjs-snap.html",
@@ -139,7 +139,7 @@ it("can fork an keep the changes to the original document", async () => {
     "__snapshots__/fork-yjs-snap-editor.json",
   );
 
-  editor.forkYDocPlugin.fork();
+  editor.forkYDocPlugin!.fork();
 
   editor.replaceBlocks(editor.document, [
     {
@@ -155,7 +155,7 @@ it("can fork an keep the changes to the original document", async () => {
     "__snapshots__/fork-yjs-snap-editor-forked.json",
   );
 
-  editor.forkYDocPlugin.merge({ keepChanges: true });
+  editor.forkYDocPlugin!.merge({ keepChanges: true });
 
   await expect(fragment.toJSON()).toMatchFileSnapshot(
     "__snapshots__/fork-yjs-snap-forked.html",