Add Devel::Cover to cpanfile

Author: oalders

cpanfile

@@ -25,6 +25,7 @@ requires 'DateTime', '1.24';
 requires 'DateTime::Format::HTTP';
 requires 'DateTime::Format::ISO8601';
 requires 'Devel::Confess';
+requires 'Devel::Cover';
 requires 'Digest::SHA';
 requires 'Encode', '2.51';
 requires 'Exporter';