Use an Array instead of a Hash

[azumakuniyuki]

An array is faster and smaller than a hash table.

Running with Perl v5.30.0 on darwin
--------------------------------------------------------------------------------
                  Rate $Hash->{...} $List->[...]
$Hash->{...} 6818182/s           --         -31%
$List->[...] 9836066/s          44%           --

$Hash->{...}    446 bytes
$List->[...]    226 bytes

Benchmarked by https://github.com/azumakuniyuki/make-perl-code-faster/blob/master/t/list-vs-hash.t

A Hash table exists which has a few keys in the following methods:

• Sisimai::Address->find (%$emailtable)
• Sisimai::DateTime->parse (%$v)
• Sisimai::DateTime->tz2second (%$digit)