Replace pkg_resources with importlib_resources (#562)

Co-authored-by: Peter Doggart <10991724+peter-doggart@users.noreply.github.com>

Author: foarsitter

flask_restx/schemas/__init__.py

@@ -6,7 +6,8 @@
 """
 import io
 import json
-import pkg_resources
+
+import importlib_resources
 
 from collections.abc import Mapping
 from jsonschema import Draft4Validator
@@ -56,8 +57,9 @@ def __init__(self, filename, validator=Draft4Validator):
 
     def _load(self):
         if not self._schema:
-            filename = pkg_resources.resource_filename(__name__, self.filename)
-            with io.open(filename) as infile:
+            ref = importlib_resources.files(__name__) / self.filename
+
+            with io.open(ref) as infile:
                 self._schema = json.load(infile)
 
     def __getitem__(self, key):

requirements/install.pip

@@ -3,3 +3,4 @@ jsonschema
 Flask>=0.8, !=2.0.0
 werkzeug !=2.0.0
 pytz
+importlib_resources