Readme.md delete key does not exist

[gytdau]

This is a small one, but, in the README.md:

export default {
  TODO_ITEM: {
    MOVE_LEFT: 'left',
    MOVE_RIGHT: 'right',
    MOVE_UP: ['up', 'w'],
    DELETE: {
      osx: ['command+backspace', 'k'],
      windows: 'delete',
      linux: 'delete',
    },
  },
}

the delete key is actually del.