Following the release of cert-manager v1.6.0, it was observed that an
update to the keystore-go library was backwards-incompatible; it
introduced a 6-character minimum length on passwords which wasn't
previously in force.
This led to https://github.com/pavel-v-chernykh/keystore-go/issues/30
which in turn led to https://github.com/pavel-v-chernykh/keystore-go/pull/31
This commit bumps to use the new version, which by default doesn't have
a min password length
Signed-off-by: Ashley Davis <ashley.davis@jetstack.io>
bfecde8116