Update DataFormatter.fromJSON to include specialIndexes

[felangel]

Bug Fix: #299 (#299)

Description

Include specialIndexes when creating DataFormatter from JSON

Motivation and Context

issue

How Has This Been Tested?

Tested locally against examples in the issue.

Note: I did not find any tests for DataFormatter so I am unsure if it is part of the scope of this ticket to add DataFormatter tests.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Author's Checklist:

• My code focuses on the main motivation and avoids scope creep.
• My code passes current tests and adds new tests where possible.
• My code is SOLID and DRY.
• I have updated the documentation as needed.

Reviewer's Checklist:

• I kept my comments to the author positive, specific, and productive.
• I tested the code and didn't find any new problems.
• I think the motivation is good for the project.
• I think the code works to satisfies the motivation.

[robertleeplummerjr]

Nice work!