Booleans do not work

[C0rn3j]

Executing

./check_json -u http://example.com -a '{"success"}' --expect '1'

where example.com returns

{"success":true}

would fail with

Not an ARRAY reference at /usr/share/perl5/Monitoring/Plugin/Threshold.pm line 19.

I added a hack in my fork that makes it work but it's not very pretty C0rn3j@a19e7aa