使用radio创建自己的Vue2组件，如何更改值

<template>
  <div>
    <label v-for="option in options" :key="option.value">
      <input type="radio" :value="option.value" v-model="selectedValue">
      {{ option.label }}
    </label>
  </div>
</template>

<script>
export default {
  data() {
    return {
      selectedValue: ''
    };
  },
  props: {
    options: {
      type: Array,
      required: true
    }
  }
};
</script>

<template>
  <div>
    <radio-group :options="radioOptions"></radio-group>
    <button @click="changeValue">更改值</button>
  </div>
</template>

<script>
import RadioGroup from './RadioGroup.vue';

export default {
  components: {
    RadioGroup
  },
  data() {
    return {
      radioOptions: [
        { label: '选项1', value: 'option1' },
        { label: '选项2', value: 'option2' },
        { label: '选项3', value: 'option3' }
      ]
    };
  },
  methods: {
    changeValue() {
      // 通过修改selectedValue的值来更改选中的选项
      this.radioOptions[0].value = 'newOption1';
    }
  }
};
</script>