Strict version of Absinthe.Adapter.LanguageConventions that will reject improperly formatted external names.

For example, this document:

{
  create_user(user_id: 2) {
    first_name
    last_name
  }
}

Would result in name-mismatch errors returned to the client.

The client should instead send the camelcase variant of the names:

{
  createUser(userId: 2) {
    firstName
    lastName
  }
}

See Absinthe.Adapter.LanguageConventions for more information.