Fix grouping by version

redmine_reporter/formatter.py

@@ -1,5 +1,6 @@
 from typing import List, Tuple
 from redminelib.resources import Issue
+from .utils import get_version
 
 
 STATUS_TRANSLATION = {
@@ -15,10 +16,6 @@ STATUS_TRANSLATION = {
 }
 
 
-def get_version(issue: Issue) -> str:
-    return str(getattr(issue, 'fixed_version', '<N/A>'))
-
-
 def hours_to_human(hours: float) -> str:
     if hours <= 0:
         return "0ч"