Version 3.3.4.0rc7

This release is being drawn from #65 before it is merged into main. It should produce binary wheels for Linux on PyPI, which I will then test through

pip install --pre fastjet

to see that the full chain is working. Note that it excludes the PxCone algorithm, the only one that depends on Fortran, for linking issues. That's why it hasn't been merged into main yet; I'd like to get a second opinion on whether this algorithm can be dropped from the library.

This shouldn't disturb users of the source distribution, though. (Unless they now get the binary one because they don't specify—but hey, that would be a great test!)