Revert "Bug 25828: Update cpanfile for 20.05 release cycle"

This reverts commit ac8249ac67.

cpanfile

@@ -10,7 +10,7 @@ requires 'CGI::Compile', '0.17';
 requires 'CGI::Emulate::PSGI', '0.20';
 requires 'CGI::Session', '4.2';
 requires 'CGI::Session::Serialize::yaml', '4.2';
-requires 'CPAN::Meta', '2.150010';
+requires 'CPAN::Meta', '2.150006';
 requires 'Cache::Memcached', '1.30';
 requires 'Cache::Memcached::Fast::Safe', '0.06';
 requires 'Class::Accessor', '0.3';
@@ -53,7 +53,7 @@ requires 'HTTP::OAI', '3.2';
 requires 'HTTP::Request::Common', '1.26';
 requires 'IPC::Cmd', '0.46';
 requires 'JSON', '2.07';
-requires 'JSON::Validator', '3.06';
+requires 'JSON::Validator', '0.97';
 requires 'LWP::Simple', '1.41';
 requires 'LWP::UserAgent', '2.033';
 requires 'Library::CallNumber::LC', '0.22';
@@ -76,8 +76,8 @@ requires 'MIME::QuotedPrint', '3.07';
 requires 'Mail::Sendmail', '0.79';
 requires 'Modern::Perl', '1.03';
 requires 'Module::CPANfile', '1.1000';
-requires 'Mojolicious', '8.12';
-requires 'Mojolicious::Plugin::OpenAPI', '2.12';
+requires 'Mojolicious', '7.21';
+requires 'Mojolicious::Plugin::OpenAPI', '1.15';
 requires 'Net::CIDR', '0.17';
 requires 'Net::Netmask', '1.9022';
 requires 'Net::Z3950::ZOOM', '1.16';
@@ -125,7 +125,7 @@ requires 'XML::RSS', '1.31';
 requires 'XML::SAX::ParserFactory', '1.01';
 requires 'XML::SAX::Writer', '0.44';
 requires 'XML::Simple', '2.14';
-requires 'YAML', '0.82';
+requires 'YAML', '0.71';
 requires 'YAML::Syck', '0.71';
 recommends 'AnyEvent', '5.0';
 recommends 'AnyEvent::HTTP', '2.13';