batch support

[Kikobeats]

Now that the service support more than one integration provider, the batch endpoint should be the way to concatenate more than one command.

My first idea is that we need to kind of batch endpoints:

• batch:series: Commands are executed on series, this means, If one of them fails, then the process finished with the error.
• batch:parallel: Commands are executed on parallel, without waiting priority. if one of them fail the rest continue the execution

At the log level, we need to attach a uuid in order to make simple all commands logs associated with the same batch call. uuid and nanoid could be good options.

Implementation:

• https://github.com/sindresorhus/p-reflect
• https://caolan.github.io/async/docs.html#series
• https://caolan.github.io/async/docs.html#parallel