currently, since we return possible actions as dict_values, pickle fails
to work with it with the following error:
```python-traceback
Traceback (most recent call last):
File "/home/frappe/frappe-bench/apps/frappe/frappe/utils/background_jobs.py", line 99, in execute_job
method(**kwargs)
File "/home/frappe/frappe-bench/apps/frappe/frappe/workflow/doctype/workflow_action/workflow_action.py", line 210, in send_workflow_action_email
enqueue(method=frappe.sendmail, queue='short', **email_args)
File "/home/frappe/frappe-bench/apps/frappe/frappe/utils/background_jobs.py", line 69, in enqueue
kwargs=queue_args)
File "/home/frappe/frappe-bench/env/lib/python3.6/site-packages/rq/queue.py", line 258, in enqueue_call
job = self.enqueue_job(job, at_front=at_front)
File "/home/frappe/frappe-bench/env/lib/python3.6/site-packages/rq/queue.py", line 324, in enqueue_job
job.save(pipeline=pipe)
File "/home/frappe/frappe-bench/env/lib/python3.6/site-packages/rq/job.py", line 516, in save
connection.hmset(key, self.to_dict(include_meta=include_meta))
File "/home/frappe/frappe-bench/env/lib/python3.6/site-packages/rq/job.py", line 469, in to_dict
obj['data'] = zlib.compress(self.data)
File "/home/frappe/frappe-bench/env/lib/python3.6/site-packages/rq/job.py", line 234, in data
self._data = dumps(job_tuple)
TypeError: can't pickle dict_values objects
```
passing the values as a list instead works fine.
Signed-off-by: Chinmay D. Pai <chinmaydpai@gmail.com>
9d36b05804