error ‘state’ is already declared in the upper scope no-shadow

const state = {
    date: '',show: false
};

const getters = {
    date: state => state.date,show: state => state.show
};

const mutations = {
    updateDate(state,payload) {
        state.date = payload.date;
    },showDatePicker(state) {
        state.show = true;
    }
};

export default {
    state,getters,mutations
};

解决这个问题的最佳方法是什么？