Support array variables

[ARHariri]

I want to pass an array of strings as a variable to a query (e.g. a list of tags that should be searched), I have no choice except change my type from String to [String]. Also, if none of the array items can be null or undefined, I should change this to [String!].
It doesn't seem good practice, so I suggest using something like Nexus list to specify both array and nullability of array items.
For example a variable input like this:

tags: {
  type: 'String',
  value: tags,
  list: [true],
  required: true,
}

should be generated as: $tags: [String!]!

So the type of Variable should be:

interface Variable {
  type: String;
  value: any;
  list?: true | [boolean];
  required: boolean;
}

list: true means the variable should be in array format but its items are nullable (that equals to list: [false]
list: [true] means the variable should be in array format and its items are not nullable
and list: undefined means the variable is not in array format