Merge pull request #15 from CybercentreCanada/hotfix/update_tool_version

Update session's service_tool_version from the results

assemblyline_service_client/task_handler.py

@@ -389,6 +389,11 @@ def handle_task_result(self, result_json_path: str, task: ServiceTask):
             result_files[file['sha256']] = copy.deepcopy(file)
             file.pop('path', None)
 
+        new_tool_version = result.get('response', {}).get('service_tool_version', None)
+        if new_tool_version is not None and self.service_tool_version != new_tool_version:
+            self.service_tool_version = new_tool_version
+            self.session.headers.update({'service_tool_version': self.service_tool_version})
+
         data = dict(task=task.as_primitives(), result=result, freshen=True)
         try:
             r = self.request_with_retries('post', self._path('task'), json=data)