This removes the need to JSON.stringify() objects in logs. Default bunyan fields plus our custom meta fields are stripped out, and everything else is stringified in the details field.
Closes#498
Schedule logic has been refactored to enable the pruning of all orphan branches.
Now, schedules aren't checked at package-time, instead package upgrades are queued regardless of schedule.
At branch time, it is checked whether the *branch* is scheduled and then the branch is not created/updated if it's off-schedule.
This enables the repository worker to know all possible branches and hence be able to determine which remaining branches in the repository are "orphans" to be deleted.
Closes#428, Closes#426
A separate routine is run after branch creation to detect any branches that should be deleted. A branch will be removed if:
- It was not created by renovate in the last run, AND
- It has no PR, or its corresponding PR is not mergeable
Closes#426, Closes#428
