Added backwards compat for setting daemon in py_versions < 3.10

Author: ahmedetefy

sentry_sdk/worker.py

@@ -1,4 +1,5 @@
 import os
+import sys
 import threading
 
 from time import sleep, time
@@ -66,7 +67,10 @@ def start(self):
                 self._thread = threading.Thread(
                     target=self._target, name="raven-sentry.BackgroundWorker"
                 )
-                self._thread.daemon = True
+                if sys.version_info < (3, 10):
+                    self._thread.setDaemon(True)
+                else:
+                    self._thread.daemon = True
                 self._thread.start()
                 self._thread_for_pid = os.getpid()