Project and library version are now stored in
version.txt and libtool_version_info.txt files respectively.
Both autotools and meson get their versioning information from this files.
Meson additionally automatically transforms library version
from libtool's own format.
Also raise meson version requirement from 0.47 to 0.57 which
is required by these changes.
`find_program()` evaluates to `python psl-make-dafsa` on Windows, so
running it with `python` evaluates to `python python psl-make-dafsa`,
causing this error on Windows:
```
"c:/python38/python.exe" "python" "C:/projects/repos/libpsl/src/psl-make-dafsa" "--output-format=binary" "C:/projects/repos/libpsl/list/public_suffix_list.dat" "tests/psl.dafsa"
c:/python38/python.exe: can't open file 'python': [Errno 2] No such file or directory
```
We must link to ws2_32.lib for all Windows builds, and we need to use
workarounds for alloca() and snprintf() since Visual Studio uses
_alloca() for alloca() and provides snprintf() only on Visual Studio
2015 or later, meaning that we need to use _snprintf() here.
Also fix the parts where we run the Python scripts to generate items,
since those scripts already have shebang lines for Meson to pick up.
Alexey Rochev
Tim Rühsen
Erica Ehrhardt
Zhao Zhili
Tim-Philipp Müller
Chris Hiszpanski
Tomasz Kłoczko
Nirbheek Chauhan
Matthew Waters
Ignacio Casal Quinteiro
Chun-wei Fan
Xavier Claessens