Release v0.2.7

Release v0.2.6

Release v0.2.5

Release v0.2.4

Release v0.2.3

Release v0.2.2

Release v0.2.1

Update remaining services to secret contract (#358)

Revert to loki v2 (#230)

This is needed because v3 requires manual intervention to upgrade
otherwise Loki refuses to start. So until there's a fix, reverting is
the easiest fix.