add py39 dict syntax

weldx/config.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import importlib.metadata
+import sys
 from pathlib import Path
 
 import asdf
@@ -175,9 +176,13 @@ def enable_quality_standard(name: str, version: AsdfVersion | str = None):
     @staticmethod
     def load_installed_standards():
         """Load all standards that are installed to the active virtual environment."""
-        for entry_point in importlib.metadata.entry_points().select(
-            group="weldx.standard"
-        ):
+        if sys.version_info < (3, 10):
+            entry_points = importlib.metadata.entry_points()["weldx.standard"]
+        else:
+            entry_points = importlib.metadata.entry_points().select(
+                group="weldx.standard"
+            )
+        for entry_point in entry_points:
             standards = entry_point.load()()
             if not isinstance(standards, list):
                 standards = [standards]