aki017
Only update api if specifes the name
The reason why I create this PR
Recently, updates https://github.com/aki017/slack-api-docs/commit/1ac07b4a9902bb1386d46ddaf484e754c6290429 by aki017/slack-api-docs-generator.
But aki017/slack-ruby-gem does not follow the latest aki017/slack-api-docs. So if you execute rake api:update, creates too many diffs in one commit.
It's undesirable to revert api update if you failed.
I think that if rake api:update specifies api name, only update the api, so prevent the tragedy and you can more easily update aki017/slack-ruby-gem in stages
I hope that aki017/slack-ruby-gem follows latest slack api as soon as possible.
Usage
# No specifies the argument, update all.
$ rake api:update
# Specifies the api name, only updates the api.
$ rake 'api:update[channels]'
What do I ask
What do you think this policy? Please let me oponion.
This seems reasonable. @aki017 are you planning on updating the gem with the latest Slack API calls?
