try to fix voters parquet file

process/R/voters.R

   dir_create(path_dir(path_out))
 
   x <- readr::read_tsv(path, col_types = voter_statewide_spec())
+  for (col in c("res_street_address", "mail_addr1")) {
+    x[[col]] <- iconv(x[[col]], "UTF-8", "UTF-8")
+  }
   arrow::write_parquet(x, path_out)
 
   invisible(path_out)