Breaking Change
#67 stop to hide comments
In v0.7.0-0, we introduced the feature to hide old comments automatically, but we decided to revert this feature.
We can hide comments with github-comment's hide command.
The following metadata is embedded into comment.
<!-- github-comment: {"Command":"plan","JobID":"aaa","JobName":"build","PRNumber":69,"Program":"tfcmt","SHA1":"xxx","Vars":{}} -->