Column values argument now accepts string values

We recently introduced a change to all API versions that fixes an earlier regression. Mutations with the column_values argument now accept both string IDs and integers. Previously, the argument only accepted integers.

This update impacts the following columns:

Both code samples below are examples of correct usage:

mutation {
  change_multiple_column_values (
    item_id:9876543210, 
    board_id:1234567890, 
    column_values: "{\"dropdown\": {\"ids\":[\"1\"]}}") {
    id
  }
}
mutation {
  change_multiple_column_values (
    item_id:9876543210, 
    board_id:1234567890, 
    column_values: "{\"dropdown\": {\"ids\":[1]}}") {
    id
  }
}