Replace pkg_resources with importlib.metadata.

Modified from @DvdGiessen suggestion in #66

docs/conf.py

@@ -12,9 +12,12 @@
 author = "Jürg Rast"
 
 # The full version, including alpha/beta/rc tags
-from pkg_resources import get_distribution
+try:
+    from importlib_metadata import version as importlib_metadata_version
+except ImportError:
+    from importlib.metadata import version as importlib_metadata_version
 
-version = get_distribution("littlefs-python").version
+version = importlib_metadata_version("littlefs-python")
 release = version
 
 # The master doc must be set for read the docs.

setup.py

@@ -45,6 +45,9 @@
             "littlefs-python = littlefs.__main__:main",
         ]
     },
+    install_requires=[
+        "importlib-metadata>=4.4; python_version < '3.10'",
+    ],
     classifiers=[
         "Development Status :: 3 - Alpha",
         "Intended Audience :: Developers",

src/littlefs/__init__.py

@@ -2,16 +2,20 @@
 import warnings
 from typing import TYPE_CHECKING, List, Tuple, Iterator, IO, Union, Optional
 
-from pkg_resources import DistributionNotFound, get_distribution
+try:
+    from importlib_metadata import version, PackageNotFoundError
+except ImportError:
+    from importlib.metadata import version, PackageNotFoundError
+
 
 from . import errors, lfs
 from .lfs import __LFS_DISK_VERSION__, __LFS_VERSION__
 from .errors import LittleFSError
 
 
 try:
-    __version__ = get_distribution('littlefs-python').version
-except DistributionNotFound:
+    __version__ = version("littlefs-python")
+except PackageNotFoundError:
     # Package not installed
     pass