Improve props argument type in Transforms.setNodes() (#4638)

* Fix `setNodes()` props argument type

Because Typescript can know which type of nodes we are modifying thanks to the `T` inferred from `match` function, 
it can also properly narrow down the `props` argument type.

* Fix TS errors in examples

* Add a changeset

site/examples/embeds.tsx

@@ -73,7 +73,9 @@ const VideoElement = ({ attributes, children, element }) => {
             const newProperties: Partial<SlateElement> = {
               url: val,
             }
-            Transforms.setNodes(editor, newProperties, { at: path })
+            Transforms.setNodes<SlateElement>(editor, newProperties, {
+              at: path,
+            })
           }}
         />
       </div>

site/examples/forced-layout.tsx

@@ -37,7 +37,9 @@ const withLayout = editor => {
         const enforceType = type => {
           if (SlateElement.isElement(child) && child.type !== type) {
             const newProperties: Partial<SlateElement> = { type }
-            Transforms.setNodes(editor, newProperties, { at: childPath })
+            Transforms.setNodes<SlateElement>(editor, newProperties, {
+              at: childPath,
+            })
           }
         }
 

site/examples/markdown-shortcuts.tsx

@@ -67,7 +67,7 @@ const withShortcuts = editor => {
         const newProperties: Partial<SlateElement> = {
           type,
         }
-        Transforms.setNodes(editor, newProperties, {
+        Transforms.setNodes<SlateElement>(editor, newProperties, {
           match: n => Editor.isBlock(editor, n),
         })
 

site/examples/richtext.tsx

@@ -74,7 +74,7 @@ const toggleBlock = (editor, format) => {
   const newProperties: Partial<SlateElement> = {
     type: isActive ? 'paragraph' : isList ? 'list-item' : format,
   }
-  Transforms.setNodes(editor, newProperties)
+  Transforms.setNodes<SlateElement>(editor, newProperties)
 
   if (!isActive && isList) {
     const block = { type: format, children: [] }