JDK11 Compat

[tresf]

Hi,

Thanks for this fantastic library. :)

The latest mslinks release fails any dependant project that is built with JDK11, the error is as follows:

    [javac] import mslinks.ShellLink;
    [javac]               ^
    [javac]   bad class file: /home/runner/work/tray/tray/lib/mslinks-1.0.7.jar(/mslinks/ShellLink.class)
    [javac]     class file has wrong version 58.0, should be 55.0
    [javac]     Please remove or make sure it appears in the correct subdirectory of the classpath.

Personally, for historical purposes, I've kept JDK8 level compatible with most of my project. I could probably move permanently to JDK11 but the above suggests JDK13 which will break a lot of projects requiring this library (including my own)

Was this change intended?

[DmitriiShamrikov]

I don't mind JDK 11 compatibility. See 1.0.8 release