Fix authz shadow declarations

Update cli

dep update certificates

Bump golangci-lint to v1.18.0 due to build error.

dep update cli v0.12.0

dep update cli

dep update cli

Merge pull request smallstep#84 from smallstep/iid-common-name

Allow custom common names in cloud identity provisioners

Merge pull request smallstep#82 from smallstep/fix-max-age-0

Fix panic when max-age is set to zero.

Merge pull request smallstep#65 from smallstep/cloud-identities

Cloud identities