This version ships a few more small fixes. Multi-target builds were missing
build arguments due to an exhausted generator. And some packages seem to
hard-code `${CMAKE_INSTALL_PREFIX}` in the `install()` call, which is an
anti-pattern, but we can set that variable too. More tests now run on Python
3.7.
Fixes:
* Empty build arguments for some targets in multi-target build by junrushao in 784
* Support packages that hardcode `CMAKE_INSTALL_PREFIX` in their `install` commands by henryiii in 786
* Logger shouldn't warn for missing lib on UNIX by henryiii in 787
Tests:
* Use `ZipFile` instead of `zipfile.Path` to enable more tests on Python 3.7 by henryiii in 785