.is() doesn't work correctly when using the .from() helper to create tagged values

[esrch]

let User = daggy.taggedSum('User', {
  Nothing: [],
  Person: ['name']
})

let user = User.Person('Ted')
console.log('Without from: ', User.is(user)) // => true
console.log('Without from: ', User.Person.is(user)) // => true

user = User.Person.from({ name: 'Tom' })
console.log('With from: ', User.is(user)) // => true
console.log('With from: ', User.Person.is(user)) // => false (should be true)

Here's a working example on CodeSandbox: https://codesandbox.io/s/j4z050m5mw

[davidchambers]

@esrch, could you see whether #33 addresses this problem?