Bug: HoistField does not support List in path

[ntziolis]

When hoisting a field and the path to the field contains a list the resulting schema ignores that there was a list in the path.

To Reproduce
Given the following schema:

type Query {
   data: [Wrapper!]!
}

type Wrapper {
   value: String!
}

Using the following configuration for hoist field:

new HoistField('Query', ['data', 'value'], 'data');

The result is:

type Query {
   data: String!
}

Expected behavior
The hoist field transform should instead generate the followings schema

type Query {
   data: [String!]!
}

Note:

• This should also work when there are multiple levels of lists (while supporting a single level of list would be the most crucial to support)

Additional context

Use case:

• We often find legacy APIs that wrap list result data in above described structures
• We use the HoistField transform (and others) to remove unnecessary nesting to provide a clean GraphQL API to consume

[ntziolis]

Added simple unit test that covers this case:
ntziolis@3107071

[ardatan]

Would you create a PR with this failing test?