fix bug where the cron method is not returning the action

this is problematic as one would not be able to add to cron rules to the
same function, or any other decorator for that matter.

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "sched2"
-version = "0.8.0"
+version = "0.8.1"
 description = "Event scheduler 2"
 authors = ["Pedro Rodrigues <[email protected]>"]
 license = "MIT"

sched2.py

@@ -125,6 +125,8 @@ def cron_runner(action):
             delay = 60 - self.timefunc() % 60
             self.enter(delay, 0, cron_runner, (action,))
 
+            return action
+
         return cron_runner
 
     @property

test_sched2.py

@@ -21,6 +21,26 @@ def action(mocker):
     return mocker.Mock(return_value=False)
 
 
+def test_repeat_method_returns_action(scheduler, action):
+    repeat_return_value = scheduler.repeat(1, 1, action, immediate=False)
+    assert repeat_return_value is action
+
+
+def test_every_decorator_method_returns_action(scheduler, action):
+    every_return_value = scheduler.every(1)(action)
+    assert every_return_value is action
+
+
+def test_cron_decorator_method_returns_action(scheduler, action):
+    cron_return_value = scheduler.cron("* * * * *")(action)
+    assert cron_return_value is action
+
+
+def test_on_decorator_method_returns_action(scheduler, action):
+    on_return_value = scheduler.on("event")(action)
+    assert on_return_value is action
+
+
 def test_repeat_adds_a_single_event(scheduler, action):
     # starts empty
     assert len(scheduler.queue) == 0