PIMS-276: Update react-datepicker

[Sharala-Perumal]

PIMS-276 : Update react-datepicker from version 4.17.0 to 4.18.0

🎯 Summary

PIMS-276

🔰 Checklist

• I have read and agree with the following checklist and am following the guidelines in our Code of Conduct document.

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation where required.
• I have tested my changes to the best of my ability.
• My changes generate no new warnings.

[codeclimate]

Code Climate has analyzed commit b8cb683 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 53.8%.

View more on Code Climate.