Add support for Java 12/13

[theangrydev]

On OpenJDK 12/13 I see this:

Exception in thread "main" java.lang.IllegalStateException: Could not detect PID form Process[pid=26, exitValue="not exited"]
	at org.zeroturnaround.process.PidUtil.doGetPid(PidUtil.java:117)
	at org.zeroturnaround.process.PidUtil.getPid(PidUtil.java:97)
Caused by: java.lang.NoSuchFieldException: handle
	at java.base/java.lang.Class.getDeclaredField(Class.java:2417)
	at org.zeroturnaround.process.PidUtil.getHandle(PidUtil.java:150)
	at org.zeroturnaround.process.PidUtil.getPidFromWin32Process(PidUtil.java:146)
	at org.zeroturnaround.process.PidUtil.doGetPid(PidUtil.java:113)
	... 4 more

[nemecec]

Added JDK 12 to Travis in PR #19. The failure is also visible there.

[nemecec]

Issue is fixed in master with commit c3a927f. @theangrydev, can you try and see if it works for you also?

[theangrydev]

@nemecec seems to work for me

[mdaloia]

It seems that this issue could be closed.
As mentioned above it was fixed with c3a927f which is included in the version 1.10