LGTM command

[gir-bot]

Add a way so we can say @bot lgtm in an issue, and it will clear any wip, triage, and/or review labels (depending on the issue type).

Optionally, you can say @bot lgtm, [key], where [key] is some user defined key, and appropriate labels will be set.

So, for an issue, I may say

@gir-bot lgtm, confirmed

And it may clear the triage label set the bug label and the confirmed label (as defined by the user).

Or if in a pull request, maybe:

@gir-bot lgtm, approved

And it would clear all the wip and review labels and set the label approved.

If we say:

@gir-bot lgtm

It would simply just remove the appropriate labels.

[gir-bot]

Probably not going to implement the additional parameter for adding labels. If we do this, it will be most likely be separate commands called add and remove. There you could define aliases to bulk assign related labels. LGTM will be used to simply remove "blocker" labels and assign optionally assign labels to indicate acceptance.