Update Getopt-Long to CPAN version 2.47

Update Getopt-Long to CPAN version 2.47

  [DELTA]

Changes in version 2.47
-----------------------

* Fix bug https://rt.cpan.org/Ticket/Display.html?id=89513.

  Should have done that earlier :)

  This changes the format for accepted float numbers:

  <optional sign>
  <optional mantissa>
  <optional dec.point and fraction>
  <optional "e" and exponent>

  Mantissa and decimal fraction may not both be omitted.

  Underscores are permissible virtually anywhere in numbers for clarity.