no library called cairo-2, Cairo, libcairo-2,

MacOS - This is after `brew install cairo`

Traceback shows:

```
OSError: no library called "cairo-2" was found
no library called "cairo" was found
no library called "libcairo-2" was found
cannot load library 'libcairo.so.2': dlopen(libcairo.so.2, 0x0002): tried: 'libcairo.so.2' (no such file), '/System/Volumes/Preboot/Cryptexes/OSlibcairo.so.2' (no such file), '/usr/lib/libcairo.so.2' (no such file, not in dyld cache), 'libcairo.so.2' (no such file), '/usr/local/lib/libcairo.so.2' (no such file), '/usr/lib/libcairo.so.2' (no such file, not in dyld cache). Additionally, ctypes.util.find_library() did not manage to locate a library called 'libcairo.so.2'
cannot load library 'libcairo.2.dylib': dlopen(libcairo.2.dylib, 0x0002): tried: 'libcairo.2.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OSlibcairo.2.dylib' (no such file), '/usr/lib/libcairo.2.dylib' (no such file, not in dyld cache), 'libcairo.2.dylib' (no such file), '/usr/local/lib/libcairo.2.dylib' (no such file), '/usr/lib/libcairo.2.dylib' (no such file, not in dyld cache). Additionally, ctypes.util.find_library() did not manage to locate a library called 'libcairo.2.dylib'
cannot load library 'libcairo-2.dll': dlopen(libcairo-2.dll, 0x0002): tried: 'libcairo-2.dll' (no such file), '/System/Volumes/Preboot/Cryptexes/OSlibcairo-2.dll' (no such file), '/usr/lib/libcairo-2.dll' (no such file, not in dyld cache), 'libcairo-2.dll' (no such file), '/usr/local/lib/libcairo-2.dll' (no such file), '/usr/lib/libcairo-2.dll' (no such file, not in dyld cache). Additionally, ctypes.util.find_library() did not manage to locate a library called 'libcairo-2.dll'
```

No source files, tests, or entry points are named. Start with the traceback and the macOS library lookup after `brew install cairo`; determine where CairoSVG searches for Cairo and verify the expected library path and name. Done means a macOS Homebrew Cairo installation can be loaded without this error.

Written by the indexing model from the issue text.