docs/conf.py: switched to importlib.metadata

Author: sami-m-g

docs/conf.py

@@ -7,17 +7,12 @@
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
 
 import datetime
-import pathlib
-import sys
-package_dir = pathlib.Path(__file__).parent.parent / 'lxmlh'
-sys.path.insert(0, str(package_dir.resolve()))
-
-from version import __version__
+import importlib.metadata
 
 project = 'lxmlh'
 copyright = f'{datetime.date.today().year}, Mina Sami'
 author = 'Mina Sami'
-release = __version__
+release = importlib.metadata.version("lxmlh")
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration