Update devel/lua-penlight to version 1.4.1.

Prompted by beta.repology.org.

## 1.4.1

### Changes

  - All functions that return instances of `pl.List`, `pl.Map` and
    `pl.Set` now require corresponding modules, so that their methods
    always work right away.

### Fixes

  - Fixed `dir.getallfiles` returning an empty array when called
    without `pattern` argument.

## 1.4.0

### Changes

### Fixes

  - `pl.path` covers edge cases better (e.g 'path.normpath` was broken)
  - `p.dir` shell patterns fixed
  - `os.tmpname` broken on modern Windows/MSVC14
  - (likewise for `utils.executeex` which depends on it)
  - `pretty.write` more robust and does not lose floating-point precision;
    saves and restores debug hooks when loading.
  - `pl.lexer` fixes: `cpp` lexer now filters space by default
  - `tablex.sortv` no longer assumes that the values are all unique
  - `stringx.center` is now consistent with Python; `stringx.rfind` and
  `string.quote_string` fixed.
  - `data.write` had a problem with default delimiter, properly
    returns error now.
  - `pl.Set` `+` and `-` now have correct semantics

### Features

  - `pl.tablex` has `union` and `merge` convenience functions
  - `pl.lapp` understands '--' meaning end of parsed arguments
  - `utils.quote_arg` quotes command arguments for `os.execute`,
    correctly handling all special characters.
  - `utils.writefile` has optional `is_bin` argument
  - 'pl.lexer' supports line numbers with string argument
  - `stringx.endswith` may be passed an array of possible suffixes.
  - `data.read` - in CSV mode, assume empty fields are numerical zero


(alnsn)