Consider wrapping examples into \donttest{

[vspinu]

When I test revdeps of lubridate I am getting systematically failures of the external api call

## Newly broken

*   checking examples ... ERROR
    
    Running examples in ‘canadacovid-Ex.R’ failed
    The error most likely occurred in:
    
    > ### Name: get_vaccination_data
    > ### Title: Get vaccination data
    > ### Aliases: get_vaccination_data
    > 
    > ### ** Examples
    > 
    > 
    > get_vaccination_data()
    Error: API requested failed with code 429
    Execution halted

I cannot reproduce it when I run the check or tests directly though.

I wonder, given that it is an external call, whether it might be a good idea to wrap examples into \donttest{...} block. WDYT?