text: export const ADD_TODO = 'ADD_TODO'
  export const ADD_ONE = 'ADD_ONE'
  export const MINUS_ONE = 'MINUS_ONE'
  export const TOGGLE_TODO = 'TOGGLE_TODO'
  export const SET_VISIBILITY_FILTER = 'SET_VISIBILITY_FILTER'
  
  export function addOne(){
    return{ type: ADD_ONE}
  }
  
  export function minusOne(){
    return{ type: MINUS_ONE}
  }
  