fread autostart is now an error

[tdhock]

hi @bogind !
Using the new version of data.table on github, fread(autostart=) is now an error (after 6 years of warning).
This results in a new check error for easycsv:

* checking examples ... ERROR
Running examples in 'easycsv-Ex.R' failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: fread_zip
> ### Title: read multiple csv files into named data frames
> ### Aliases: fread_zip
> ### Keywords: ~utilities ~misc
> 
> ### ** Examples
> 
> 
>   require(easycsv)
>   filezip <- system.file("exampleZips", "example_tables.zip", package="easycsv")
>   fread_zip(filezip)
Error in data.table::fread(input = tbl, sep = sep, nrows = nrows, header = header,  : 
  'autostart' is deprecated. Consider skip='string' or skip=n. This argument will be removed in the next release.
Calls: fread_zip -> <Anonymous> -> stopf -> raise_condition -> signal
Execution halted

Can you please run data.table::update_dev_pkg() to get the new version of data.table for testing, then change easycsv so that it checks without error, then submit a new version of easycsv to CRAN? (so that it will be compatible with the new version of data.table that we plan to submit to CRAN in the next few weeks)
thanks!