fix issue 186

[alenap93]

Description

Fixed error 400 'The value must be a valid' when a field of type timestamp is added or edited. Furthermore added unit tests to TimestampInputComponent

Related Issues

#186

How can it be tested?

Check list before submitting

• This PR is wrote in a clear language and correctly labeled
• I created the related changeset for my changes with npx changeset
• I have performed a self-review of my code (no debugs, no commented code, good naming, etc.)
• I wrote the relative tests
• I created a PR for the documentation if necessary and attached the link to this PR

[codecov]

Bundle Report

Bundle size has no change ✅

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.60%. Comparing base (296a571) to head (79eb9af).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #305      +/-   ##
==========================================
+ Coverage   65.40%   65.60%   +0.20%     
==========================================
  Files          51       51              
  Lines        1451     1451              
  Branches      331      331              
==========================================
+ Hits          949      952       +3     
- Misses        461      497      +36     
+ Partials       41        2      -39     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.