[slate] Fix ObjectAndType interface: types -> type (#30388)

* Fix ObjectAndType interface: `types` -> `type`

* Fix slate tests: use SchemaProperties

The `Schema` class no longer exists, so `Schema.create` would not work.

types/slate/index.d.ts

@@ -27,7 +27,7 @@ export interface RulesByNodeType {
 
 export interface ObjectAndType {
     object?: string;
-    types?: string;
+    type?: string;
 }
 
 export interface Rules {

types/slate/slate-tests.ts

@@ -1,4 +1,4 @@
-import { Value, Data, BlockJSON, Document, Editor, KeyUtils, Range, Point, Inline, Mark } from "slate";
+import { Block, Value, Data, BlockJSON, Document, Editor, KeyUtils, Range, Point, Inline, Mark, SchemaProperties } from "slate";
 
 const data = Data.create({ foo: "bar " });
 const value = Value.create({ data });
@@ -282,3 +282,36 @@ editor
 KeyUtils.setGenerator(() => "Test");
 KeyUtils.create();
 KeyUtils.resetGenerator();
+
+const schema: SchemaProperties = {
+    document: {
+        nodes: [
+            {
+                match: [
+                    { type: 'block-quote' },
+                    { type: 'heading-one' },
+                    { type: 'heading-two' },
+                    { type: 'image' },
+                    { type: 'paragraph' },
+                    { type: 'bulleted-list' },
+                    { type: 'numbered-list' },
+                    { type: 'list-item' },
+                ],
+            },
+        ],
+        last: { type: 'paragraph' },
+        normalize: (editor: Editor, { code, node }: any) => {
+            switch (code) {
+                case 'last_child_type_invalid': {
+                    const paragraph = Block.create('paragraph');
+                    return editor.insertNodeByKey(node.key, node.nodes.size, paragraph);
+                }
+            }
+        },
+    },
+    blocks: {
+        image: {
+            isVoid: true,
+        },
+    },
+};