ignore empty pseudo packages, allow JPype >=1.2.1,<2.0.0

This ignores empty (pseudo) packages - say, packages that neither contain subpackages nor classes.

Such "packages" are not importable in Java, but JPype generates them for directories that appear in Javadoc JARs but not in the source JARs - e.g. "class-use" in Guava.

assigned to @mihostet

mentioned in commit f0260dcb

merged

FYI, I think this isn't quite right, as I understand it will match 2.0.0rc1 for example. The docs on this are at https://www.python.org/dev/peps/pep-0440/#compatible-release.

It should rather be: JPype1>=1.2.1,<2.* I think.

I don't think we need to do anything about this now, but just a heads-up for the future.

Thanks for the pointer, indeed that's not fully right - I will just edit the file on master for the next release