The COSCUP volunteer platform is an online tool that allows interested individuals to register as volunteers for the conference, and a way for volunteers to communicate with each other and with the organizers. COSCUP 志工平台是一個可以讓有興趣的人登錄成為 COSCUP 的志工，同時也提供志工彼此溝通和與大會聯繫的方式。
Fixed #92 #93 #94 #95
Update expense status, and update the submitted expense's content, total.
Pull request type
Please check the type of change your PR introduces:
What is the current behavior?
The submitted expense can not update.
Issue Number: #92 #93 #94 #95
What is the new behavior?
Other information
N/A