fix: check for docstatus if doc is submittable

[MyuddinKhatri]

closes #45

check for docstatus if doc is submittable instead of string "Approved"

[MyuddinKhatri]

@agritheory json_diff is complaining about field_name does not exist in property setter, pre-commit removed it its value was null, should we add a check to ignore field_name while iterating through property setter to leave it as it is even though the value is null?

[github-actions[bot]]

Coverage Report

File	Stmts	Miss	Cover	Missing
__init__.py	1	0	100%
hooks.py	12	0	100%
install.py	8	8	0%	1, 4–5, 8–11, 17
approvals
__init__.py	0	0	100%
api.py	191	117	38%	21, 44, 59–60, 69, 71, 91–92, 94, 120–133, 135–140, 142–143, 145, 150–159, 164–167, 178, 180–185, 187–188, 190, 192–196, 198, 200–201, 206, 209–210, 213, 218, 222–223, 227–228, 233–237, 239–244, 249–250, 254–263, 268–269, 271, 274–275, 277–279, 281, 295, 311, 313–318, 328, 330–332
approvals/doctype
__init__.py	0	0	100%
approvals/doctype/approval_doctype
__init__.py	0	0	100%
approval_doctype.py	3	0	100%
approvals/doctype/document_approval
__init__.py	0	0	100%
document_approval.py	15	15	0%	1–3, 6–9, 11–14, 16–17, 26–27
test_document_approval.py	3	0	100%
approvals/doctype/document_approval_rule
__init__.py	0	0	100%
document_approval_rule.py	65	11	83%	9, 19, 22, 25, 50, 61, 64, 69, 74–75, 86
test_document_approval_rule.py	3	0	100%
approvals/doctype/document_approval_settings
__init__.py	0	0	100%
document_approval_settings.py	15	2	86%	18–19
test_document_approval_settings.py	3	0	100%
approvals/doctype/user_document_approval
__init__.py	0	0	100%
test_user_document_approval.py	3	0	100%
user_document_approval.py	28	28	0%	1–4, 7–9, 11–12, 14–15, 17–18, 20–31, 33–34, 37
approvals/notification
__init__.py	0	0	100%
approvals/notification/approval_notification
__init__.py	0	0	100%
approval_notification.py	3	3	0%	1, 4, 6
approvals/notification/rejection_notification
__init__.py	0	0	100%
rejection_notification.py	3	3	0%	1, 4, 6
config
__init__.py	0	0	100%
desktop.py	3	3	0%	1, 4–5
docs.py	2	2	0%	10–11
tests
conftest.py	23	2	91%	25–26
test_approval_workflow.py	20	0	100%
test_non_workflow_approval.py	35	21	40%	13, 18, 23, 31–32, 35–37, 44, 46–55, 57–58
TOTAL	439	215	51%