What’s new in PyPy2.7 7.3.0+

Make cpyext test faster, especially on py3.6

Handle NAN more correctly in array.array for __eq__ and count

Fixes incorrect error text for int('1', base=1000)

adapt contributing documentation to heptapod

Improve code generation for generators (and generator expressions in particular) when passing them to builtin functions that consume iterators, such as sum, map, max, etc.

Improves warmup time by up to 20%.

Improve performance of io.StringIO(). It should now be faster than CPython in common use cases.

Improve the code generation for inner functions that use outer variables that are constant.

Enable _cppyy for win32, prefer newer msvc compilers