Merge pull request #409 from Ensembl/bugfix/cpanfile_try-tiny

cpanfile: require Try::Tiny

cpanfile

@@ -4,6 +4,7 @@ requires 'HTTP::Tiny';
 requires 'IO::Compress::Gzip';
 requires 'URI::Escape';
 requires 'Config::IniFiles';
+requires 'Try::Tiny';
 
 test_requires 'Test::Warnings';
 test_requires 'Test::Differences';