Mark Test::WWW::Mechnize 1.56 and 1.58 bad

They incorrectly import Test::LongString, which issue the following
warning that fail RT warning tests:

    Odd number of elements in hash assignment

See also petdance/test-www-mechanize#79

Author: sunnavy

etc/cpanfile

@@ -140,7 +140,7 @@ on 'develop' => sub {
     requires 'Test::NoWarnings';
     requires 'Test::Pod';
     requires 'Test::Warn';
-    requires 'Test::WWW::Mechanize', '>= 1.30';
+    requires 'Test::WWW::Mechanize', '>= 1.30, != 1.56, != 1.58';
     requires 'Test::WWW::Mechanize::PSGI';
     requires 'Try::Tiny';
     requires 'WWW::Mechanize', '>= 1.80';