Update OptionalData

[helgee]

There is no functional change but I needed to drop old Julia versions. Therefore it is a minor release. The package did not have a Project.toml, yet.

[coveralls]

Pull Request Test Coverage Report for Build 217

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-2.4%) to 64.305%

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Totals
Change from base Build 215:	-2.4%
Covered Lines:	1706
Relevant Lines:	2653

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💛 - Coveralls

[ronisbr]

Thanks!!