Revaluate scoring of packages that don't exist

[parmsam-pfizer]

Wasn't able to find a mention of this issue being raised before. It seems like risk scores are generated for packages even if they are missing. We might reconsider scoring for packages that don't exist.

library(riskmetric)
library(dplyr)
pkgs <- c(
  "dplier",
  "stringerer",
  "dplyr"
  )
pkg_ref(pkgs) %>%
  pkg_assess() %>%
  pkg_score()
#> # A tibble: 3 x 22
#>   package    version pkg_ref             pkg_s~1 news_~2 has_v~3 size_~4 has_b~5
#>   <chr>      <chr>   <lst_f_p_>            <dbl> <pkg_s> <pkg_s> <pkg_s> <pkg_s>
#> 1 dplier     <NA>    dplier<missing>       0.986 NA      NA      NA      NA     
#> 2 stringerer <NA>    stringerer<missing>   0.986 NA      NA      NA      NA     
#> 3 dplyr      1.1.1   dplyr<install>        0.412  1       1      NA       1     
#> # ... with 14 more variables: bugs_status <pkg_scor>, license <pkg_scor>,
#> #   export_help <pkg_scor>, reverse_dependencies <pkg_scor>,
#> #   downloads_1yr <pkg_scor>, dependencies <pkg_scor>, has_website <pkg_scor>,
#> #   r_cmd_check <pkg_scor>, remote_checks <pkg_scor>,
#> #   has_maintainer <pkg_scor>, exported_namespace <pkg_scor>,
#> #   has_news <pkg_scor>, has_source_control <pkg_scor>,
#> #   covr_coverage <pkg_scor>, and abbreviated variable names 1: pkg_score, ...

^{Created on 2023-06-06 by the reprex package (v2.0.1)}