Updated CXX env var and removed redundant

library_dirs in setup

Enhanced the 'CXX' environment variable assignment in setup.py to
include the '-shlib' flag for shared library support. Also, streamlined
the Extension configuration by eliminating the now unnecessary
specification of default library directories, simplifying the build
process.

Refactors setup configuration for efficiency and compatibility with
shared libraries.

setup.py

@@ -6,14 +6,13 @@ import os
 
 from Cython.Build import cythonize
 
-os.environ['CXX'] = 'h5c++'
+os.environ['CXX'] = 'h5c++ -shlib'
 
 ext_modules = [
     Extension(
         'limedriver.binding',
         sources=['src/limedriver/limedriver.pyx', 'extern/limedriver/src/limedriver.cpp'],
         include_dirs=["extern/limedriver/src/", "/usr/include/hdf5/serial/"], # TODO: This is REALLY ugly.
-        library_dirs=["/usr/lib/"],
         libraries=["LimeSuite", "hdf5_cpp", "hdf5"],
         language="c++",
     ),