github: Don't crash if a team is a reviewer

[jerry-skydio]

Adding full team support looks like a medium task,
but for now we can at least not crash.

Topic: teams
Reviewers: brian-k
closes #73

[jerry-skydio]

Reviews in this chain:
└#75 github: Don't crash if a team is a reviewer

[jerry-skydio]

#	head	base	diff	date	summary
0	7dbeb285	4b357f91	diff	Oct 12 2:06 PM	1 file changed, 4 insertions(+)
1	40148f6f	d932439f	diff	Oct 13 18:43 PM	1 file changed, 8 insertions(+), 2 deletions(-)
2	33f503ce	d932439f	diff	Oct 13 18:48 PM	1 file changed, 4 insertions(+), 7 deletions(-)

[brian-kubisiak-skydio]

Ah nvm, see you don't want to add the team as a reviewer just yet.