Remove usage of pkg_resources (deprecated)

backslash/__version__.py

@@ -1,3 +1,4 @@
-import pkg_resources
+from ._compat import get_distribution
 
-__version__ = pkg_resources.get_distribution('backslash').version
+
+__version__ = get_distribution("backslash").version

backslash/_compat.py

@@ -0,0 +1,12 @@
+import sys
+
+if sys.version_info < (3, 8):
+    # pylint: disable=unused-import
+    import pkg_resources
+
+    get_distribution = pkg_resources.get_distribution
+else:
+    # pylint: disable=unused-import
+    import importlib.metadata
+
+    get_distribution = importlib.metadata.distribution

backslash/contrib/slash_plugin.py

@@ -5,7 +5,6 @@
 import itertools
 import json
 import os
-import pkg_resources
 import socket
 import sys
 import time
@@ -28,6 +27,7 @@
 from urlobject import URLObject as URL
 from requests import HTTPError
 from shlex import quote as shellquote
+from packaging.version import parse as parse_version
 from ..client import Backslash as BackslashClient
 from ..exceptions import ParamsTooLarge
 from ..utils import ensure_dir
@@ -327,7 +327,7 @@ def get_tests_to_resume(self, session_id, filters_dict):
 
     def _get_test_info(self, test):
         if test.__slash__.is_interactive() and \
-           pkg_resources.parse_version(slash.__version__) < pkg_resources.parse_version('1.6.0'):
+           parse_version(slash.__version__) < parse_version('1.6.0'):
             returned = {
                 'file_name': '<interactive>',
                 'class_name': '<interactive>',