Update 1.2.1 to fix mdsb100#5

Update to 1.2.0

Update 1.1.6 to fix: If the assignee is null when use ‘—-assigned_to_me’

Update version to 1.1.5

Fix editIssue, change "title" to optional.Update version to 1.1.4

Update README.md

Fix and update version 1.1.1

Modify read me. Update version to 1.1.0.

Update to 1.0.1

Modify README.md