Check all test cases before merging into upstream.

[tetsuharuohzeki]

The status of mergeablity of GitHub's pull request only checks code's mergeability. But this is not reliable approach because there are some case that can merge codes but fails testing or build.

To achieve more reliability, this bot should check all test cases before merging into upstream.

Other issues.

Block https://github.com/nekoya/popuko/issues/27

[tetsuharuohzeki]

We would need:

• Collaboration with CI (pluggable)
  • we should add the config to use this feature.
• sqlite or other db to manage an inbound queue.

[tetsuharuohzeki]

note:

As my guess, we would be able to implement this feature

1. by status event,
2. and checking sha
3. and checking the branch name.

So we would need to store the sha of the tip of the auto branch.

[tetsuharuohzeki]

This feature is almost implemented. We can dogfooding now!