bindCache(): web API

system.time(hadley <- latest_events("hadley"))
#>    user  system elapsed 
#>   0.074   0.015   0.796
head(hadley)
#> # A tibble: 6 × 2
#>   repo            type             
#>   <chr>           <chr>            
#> 1 tidyverse/purrr IssueCommentEvent
#> 2 tidyverse/purrr IssueCommentEvent
#> 3 tidyverse/purrr IssuesEvent      
#> 4 tidyverse/purrr IssueCommentEvent
#> 5 tidyverse/purrr IssueCommentEvent
#> 6 tidyverse/purrr IssueCommentEvent