Update to 6.10

Upstream changes:
6.10      2022-08-22 13:20:12Z
    - Use "croak" instead of "die" to show errors from the perspective of the
      caller [RT#20499] (GH#29) (Julien Fiegehenn)
    - Remove the executable bit from a couple of tests (GH#41) (James Raspass)
    - <option>s within select fields without a name no longer get merged into
      the previous select field (GH#2) (Julien Fiegehenn)
    - find_input() can now take a reference to undef to explicitly find inputs
      that have no name (GH#2) (Julien Fiegehenn)

6.09      2022-08-14 22:16:37Z

    - Replace "use vars" with "our" (GH#34) (James Raspass)
    - Remove superfluous "use lib" (GH#35) (James Raspass)
    - Replace "Test" with "Test::More" (GH#36) (James Raspass)
    - Remove superfluous variable copy (GH#37) (James Raspass)

6.08      2022-08-14 09:26:10Z
    - Remove Authority section from dist.ini (GH#27) (Olaf Alders)
    - Allow buttons to not have a value (GH#8) (Felix Ostmann and Julien Fiegehenn)
    - The legacy API of FileInput fields now correctly supports setting a
      custom filename (GH#10) (Gil Magno and Julien Fiegehenn)
    - Allow undef filename for FileInput if there is a Content header (GH#30)
      (Julien Fiegehenn)

(wen)