为什么通过对象方法修改属性不会触发重新渲染？

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      someObject: { property: 'initialValue' }
    };
  }

  updateProperty = () => {
    this.setState({
      someObject: { ...this.state.someObject, property: 'newValue' }
    });
  }

  render() {
    return (
      <div>
        <p>{this.state.someObject.property}</p>
        <button onClick={this.updateProperty}>Update Property</button>
      </div>
    );
  }
}

<template>
  <div>
    <p>{{ someObject.property }}</p>
    <button @click="updateProperty">Update Property</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      someObject: { property: 'initialValue' }
    };
  },
  methods: {
    updateProperty() {
      this.someObject = { ...this.someObject, property: 'newValue' };
    }
  }
};
</script>