remove useless use of Test::Deep in tests

don't need to use Test::Deep if we are not going to use its functions

this patch was sourced from the fedora perl-devel mailing list[1],
in which i see more patches for CGI - fedora perl-devel people: if
you're going to patch modules then please send those patches upstream
where relevant. many perl modules are now on github (including this
one) so it's easy, and it prevents alternate versions of modules
that could lead to frustrating debugging sessions because *your*
version of FCGI (2.04) is different to what the *real* version of
FCGI (2.04) is[2].

bump to version 2.05 to go to CPAN

 * [1] https://lists.fedoraproject.org/pipermail/perl-devel
 * [2] the "real" version of FCGI being that available on CPAN