Checks data types

[sgvignali]

Proposed changes

What types of changes does your code introduce? (Put an x in the boxes that apply)

• Bugfix
• New feature
• Documentation update

Please explain the changes you've made here. This will help the maintainers to see why we should accept this pull request. Please, if it does not yet exist, create an issue and be sure to link the PR to that issue.

Checklist

The first three are required (you can also fill these out after creating the PR).

• I have read the contributing guidelines
• All steps described in the contributing guidelines can be executed successfully
• I have linked the PR to the corresponding issue, see link a pull request to and issue
• I have added tests that prove my fix is valid or my feature works (if appropriate)
• I have added the necessary documentation (if appropriate)

💔 Thank you!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ
R/cat_add_data.R	100.00% <ø> (ø)
R/cont_add_data.R	100.00% <100.00%> (ø)