JMCF 2.1.0 brings the following improvements:

Jira 8 compatibility

JMCF 2.1.0 is fully compatible with Jira Software/Core 8, as well as with Jira Service Desk 4.0. JMCF 2.1.0 is also backward compatible with Jira 7.0.11 and above.

Statistics-compatible duration fields

JMCF Calculated (Scripted) Duration fields and Time In Status fields can now use a statistics-compatible search template, which means that these fields can now be used in Statistics gadgets such as the Pie Chart.

Groovy improvements

And several bug fixes