Merge branch 'hotfix/0.2.1'

* hotfix/0.2.1:
  update readme
  bump version to 0.2.1
bump version to 0.2.2
add dev update task
Merge branch 'hotfix/0.2.2' into develop

* hotfix/0.2.2:
  add dev update task
  bump version to 0.2.2