[Biopython] Versions of PyPy to support?

[Peter Cock]

Hello all,

PyPy 2.3 is due out shortly, which prompts me to ask which
versions of PyPy are people using Biopython with?

PyPy is an alternative implementation of Python, which
can often be much faster - see http://pypy.org/

We're currently testing with PyPy 1.8, 1.9, 2.0, 2.1 and 2.2
but I would like to suggest we drop at least PyPy 1.8 and 1.9.

Is that OK?

Thanks!

Peter