Please update JFlex to 1.6.1

[Lucretia]

1.4 is old. I cannot use proper unicode names in my scanner.

[sarowe]

I'm working on it, hope to have it working in the next month or two.

[romildo]

Any chance of having a new release of the JFlex plugin supporting JFlex 1.6.1 version and IntelliJ IDEA version 2016.1 (or greater)?