Added a check before each function call to check whether new source data is available and clear the client-side cache if so.
Skipping all API calls on CRAN to address the CRAN policy: "Packages which use Internet resources should fail gracefully with an informative message if the resource is not available or has changed (and not give a check warning nor error)."
Checklist
[X] Code compiles correctly
[X] Created tests which fail without the change (if applicable)
[X] All lint and unit tests passing
[X] Extended the README / documentation, if necessary
Description
Checklist