minor fix in types and minor version upgrade for datepicker

[j3ernhard]

Summary

Please describe your changes.

Checklist

Please ensure that you've fulfilled the following tasks:

• My code follows the style guides of this project and yarn lint does not throw errors
• My code is well tested and did not decrease the test coverage
• All new and existing tests have passed
• My submission passes the build
• I've added changes to CHANGELOG.MD
• I've updated the project documentation

[coveralls]

Pull Request Test Coverage Report for Build 990

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 966:	0.0%
Covered Lines:	462
Relevant Lines:	462

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💛 - Coveralls