Update to PoPS Core with explicit casts

[wenzeslaus]

This updates PoPS Core code to the latest version on main with explicit casts and conversions from floating point numbers to integers and booleans.

[wenzeslaus]

Unfortunately, the CI fails with:

      ) at retrieve.R#229
   6: if (renv_record_tagged(record))
        return(renv_retrieve_repos_impl(record)) at retrieve.R#577
   5: name <- name %||% renv_retrieve_repos_archive_name(record, type) at retrieve.R#899
   4: name <- name %||% renv_retrieve_repos_archive_name(record, type) at retrieve.R#899
   3: ext <- renv_package_ext(type) at retrieve.R#712
   2: type <- match.arg(type, c("binary", "source")) at package.R#123
   1: stop(sprintf(ngettext(length(chs <- unique(choices[nzchar(choices)])), 
          "'arg' should be %s", "'arg' should be one of %s"), paste(dQuote(chs), 
  Execution halted
          collapse = ", ")), domain = NA)

on macOS and on Ubuntu with:

- Installing terra ...                          FAILED

Error in dyn.load(file, DLLpath = DLLpath, ...) : 
  unable to load shared object '/home/runner/work/rpops/rpops/renv/staging/1/terra/libs/terra.so':
  libproj.so.22: cannot open shared object file: No such file or directory
Calls: loadNamespace -> library.dynam -> dyn.load
Execution halted

Error: Error: error testing if 'terra' can be loaded [error code 1]
Traceback (most recent calls last):
14: renv::restore()
13: renv_restore_run_actions(project, diff, current, lockfile, rebuild)
12: renv_install_impl(records)
11: renv_install_staged(records)
10: renv_install_default(records)
 9: handler(package, renv_install_package(record))
 8: renv_install_package(record)
 7: withCallingHandlers(renv_install_package_impl(record), error = function(e) writef("FAILED"))
 6: renv_install_package_impl(record)
 5: withCallingHandlers(if (isbin) renv_install_test(package), error = function(err) unlink(installpath, 
        recursive = TRUE))
 4: renv_install_test(package)
 3: renv_system_exec(command = R(), args = c("--vanilla", "-s", "-f", 
        renv_shell_path(script)), action = sprintf("testing if '%s' can be loaded", 
        package))
 2: abort(sprintf("error %s [error code %i]", action, status), body = renv_system_exec_details(command, 
        args, output))
 1: stop(fallback)
Execution halted

For numerical results, however, I don't expect any issues because the changes are supposed to preserve status quo and only formalize the conversions.