Build updated for upstream libaegis 0.9.0 simplified API with matching changes on Python side. Set lower MacOS build target (11.0). Build abi3 version for all supported Python versions, reducing the number of wheels. Other build cleanup.

pyproject.toml

@@ -37,6 +37,6 @@ package-dir = {"" = "src"}
 packages = ["aeg"]
 
 [tool.setuptools.package-data]
-aeg = ["*.h", "*.so", "*.pyd"]
+aeg = ["*.h"]
 
 [tool.setuptools_scm]