fix(tags): fixes ImportError on Python >=3.11 (#1363) (#1364)

Author: jakob-keller

commitizen/tags.py

@@ -8,8 +8,6 @@
 from string import Template
 from typing import TYPE_CHECKING, NamedTuple
 
-from typing_extensions import Self
-
 from commitizen import out
 from commitizen.defaults import DEFAULT_SETTINGS, Settings, get_tag_regexes
 from commitizen.git import GitTag
@@ -22,8 +20,16 @@
 )
 
 if TYPE_CHECKING:
+    import sys
+
     from commitizen.version_schemes import VersionScheme
 
+    # Self is Python 3.11+ but backported in typing-extensions
+    if sys.version_info < (3, 11):
+        from typing_extensions import Self
+    else:
+        from typing import Self
+
 
 class VersionTag(NamedTuple):
     """Represent a version and its matching tag form."""