replace 'problems' key with 'exercises' in config.json - see #36
replace 'problems' key with 'exercises' in config.json - see #36

exercism/xperl6,mienaikage/xperl6,mienaikage/xperl6,mienaikage/exercism-perl6,mienaikage/exercism-perl6,exercism/xperl6,mienaikage/exercism-perl6,mienaikage/xperl6,exercism/xperl6