auto release for 0.8.0

auto incr version

auto release for 0.7.0

auto incr version

auto release for 0.6.2

auto incr version

auto release for 0.6.1

auto incr version

auto release for "0.6.0"

auto incr version

fix api of `uphost` and mark region config is optional (ucloud#15)

BUGFIX:

- Mark `region` config is optional
- Update field `CPUSet` at the model `PHostSetSchema`

add usms product (ucloud#14)

FEATURE:

- Add `SendUSMSMessage` as public api
- Add `GetUSMSSendReceipt` as public api
- Add `CreateUSMSSignature` as public api
- Add `QueryUSMSSignature` as public api
- Add `UpdateUSMSSignature` as public api
- Add `DeleteUSMSSignature` as public api
- Add `CreateUSMSTemplate` as public api
- Add `QueryUSMSTemplate` as public api
- Add `UpdateUSMSTemplate` as public api
- Add `DeleteUSMSTemplate` as public api

Improve acceptance testing & fix bug when project id is empty (ucloud#12

)

ENHANCEMENT:

- Add test scenario and improve the testing framework
- Improve continuous deployment workflow, integration on a private cluster

BUGFIX:

- Fix unexpected error when project id is empty

fix schema request params error (ucloud#11)

improving unit test for core modules (ucloud#9)

FEATURE:

- Add testing framework supported `scenario` and `step`, inspire by *ThoughtWorks, Guage* (ucloud#9)

ENHANCEMENT:

- Add unit testing cases to improving line coverage at core modules. (ucloud#9)
- Improved CI workflow. (ucloud#9)

BUGFIX:

- Fix JSON decoding error for py3.5. (ucloud#9)