Update the version requirement in Build.PL

Build.PL

@@ -8,7 +8,7 @@ my $build = Module::Build->new(
   dist_author        => 'Dave Cross <dave@perlhacks.com>',
   module_name        => 'Perlanet',
   requires           => {
-    'perl'                 => '5.6.0',
+    'perl'                 => '5.10.0',
     'Encode'               => 0,
     'List::Util'           => 0,
     'URI::Fetch'           => 0,