chore: Add shouldCellUpdate test case

tests/Cell.spec.tsx

@@ -0,0 +1,44 @@
+import React from 'react';
+import { mount } from 'enzyme';
+import Table from '../src';
+
+describe('Table.Cell', () => {
+  it('shouldCellUpdate', () => {
+    let renderTime = 0;
+
+    const Demo = () => {
+      const [, forceUpdate] = React.useState({});
+
+      return (
+        <>
+          <Table
+            data={[{ key: 'light' }]}
+            columns={[
+              {
+                shouldCellUpdate: (record, prevRecord) => prevRecord.key !== record.key,
+                dataIndex: 'key',
+                render: value => {
+                  renderTime += 1;
+                  return value;
+                },
+              },
+            ]}
+          />
+          <button
+            type="button"
+            onClick={() => {
+              forceUpdate({});
+            }}
+          />
+        </>
+      );
+    };
+
+    const wrapper = mount(<Demo />);
+
+    for (let i = 0; i < 100; i += 1) {
+      wrapper.find('button').simulate('click');
+      expect(renderTime).toEqual(1);
+    }
+  });
+});