bug: dotobject should return null when a key is not found

[elboletaire]

Describe the bug

Current dotobject behavior is to return the most nearest parent found, whilst it should be returning null (or undefined) when not finding a key

To Reproduce

Use election.get('token.type') in an election not having token.type defined. If it has token it will return token's contents; when not having even the token field defined, it returns the parent meta one.

Expected behavior

To have a falsy return when the key does not exist.

Workaround

Right now, to workaround this, I'm checking the type of the response whenever possible, i.e.

{typeof election?.get('token.type') === 'string' && (
  <Box>
    <Text color='process.date' fontWeight='bold'>
      {t('process.token_type')}
    </Text>
    <Text textTransform='capitalize'>{election.get('token.type')}</Text>
  </Box>
)}

Otherwise in cases like this it would fail, since objects cannot be directly render as JSX elements.

Additional context

I'll try to fix it myself, since it was implemented by me (unless someone wants to dig in it first, ofc).