Add version_label property

Author: jamesoff

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+## 2.2.0 - 2024-11-26
+
+### Added
+
+- Support the `VersionLabel` response element (as the `version_label` property)
+- Bump boto3 and related libraries
+
 ## 2.1.2 - 2024-06-18
 
 ### Changed

appconfig_helper/appconfig_helper.py

@@ -75,6 +75,7 @@ def __init__(
         self._fetch_on_read = fetch_on_read
         self._next_config_token = None  # type: Optional[str]
         self._poll_interval = max_config_age
+        self._version_label = None  # type: Optional[str]
         if fetch_on_init:
             self.update_config()
 
@@ -116,6 +117,11 @@ def content_type(self) -> Union[None, str]:
         """The content type of the configuration retrieved from AppConfig."""
         return self._content_type
 
+    @property
+    def version_label(self) -> Optional[str]:
+        """The version label of the configuration retrieved from AppConfig."""
+        return self._version_label
+
     def start_session(self) -> None:
         """Start the config session and receive the next config token and poll interval"""
         response = self._client.start_configuration_session(
@@ -190,4 +196,5 @@ def update_config(self, force_update: bool = False) -> bool:
         self._last_update_time = time.time()
         self._raw_config = content
         self._content_type = response["ContentType"]
+        self._version_label = response["VersionLabel"]
         return True