Update Go SDK to v0.28.0

Author: florisvdg

go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/mitchellh/mapstructure v1.1.2
 	github.com/op/go-logging v0.0.0-20160315200505-970db520ece7
 	github.com/secrethub/demo-app v0.1.0
-	github.com/secrethub/secrethub-go v0.27.0
+	github.com/secrethub/secrethub-go v0.28.0
 	github.com/zalando/go-keyring v0.0.0-20190208082241-fbe81aec3a07
 	golang.org/x/crypto v0.0.0-20190313024323-a1f597ede03a
 	golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223

go.sum

@@ -74,14 +74,8 @@ github.com/secrethub/demo-app v0.1.0 h1:HwPPxuiSvx4TBE7Qppzu3A9eHqmsBrIz4Ko8u8pq
 github.com/secrethub/demo-app v0.1.0/go.mod h1:ymjm8+WXTSDTFqsGVBNVmHSnwtZMYi7KptHvpo/fLH4=
 github.com/secrethub/secrethub-cli v0.30.0/go.mod h1:dC0wd40v+iQdV83/0rUrOa01LYq+8Yj2AtJB1vzh2ao=
 github.com/secrethub/secrethub-go v0.21.0/go.mod h1:rc2IfKKBJ4L0wGec0u4XnF5/pe0FFPE4Q1MWfrFso7s=
-github.com/secrethub/secrethub-go v0.23.1-0.20200305163234-06577e254126 h1:GiI8Lr8mghQp3KFQVfvlu1AZA8NxsIXko+IYhYJTHMY=
-github.com/secrethub/secrethub-go v0.23.1-0.20200305163234-06577e254126/go.mod h1:Wr4gXWrk8OvBHiCttjLq7wFdKSm07rlEhq5OSYPemtI=
-github.com/secrethub/secrethub-go v0.25.0 h1:cpYmkLRurrrw6NNE4PagPNDOn7kvY6UMrnnDxrvuI1M=
-github.com/secrethub/secrethub-go v0.25.0/go.mod h1:rc2IfKKBJ4L0wGec0u4XnF5/pe0FFPE4Q1MWfrFso7s=
-github.com/secrethub/secrethub-go v0.26.0 h1:BonMEvD3rdAQyY3L91Ze7Mkq0KXXhB3Esn/cDUq3qYc=
-github.com/secrethub/secrethub-go v0.26.0/go.mod h1:Wr4gXWrk8OvBHiCttjLq7wFdKSm07rlEhq5OSYPemtI=
-github.com/secrethub/secrethub-go v0.27.0 h1:9v+BCEQC+8XNXZPtsoz2Fg+YQOUrJgFBR6Z/ieaICHw=
-github.com/secrethub/secrethub-go v0.27.0/go.mod h1:Wr4gXWrk8OvBHiCttjLq7wFdKSm07rlEhq5OSYPemtI=
+github.com/secrethub/secrethub-go v0.28.0 h1:N46plUaOIqeE51X/qpNY9rCKTVL7TIlS7LJHoF3z1fA=
+github.com/secrethub/secrethub-go v0.28.0/go.mod h1:Wr4gXWrk8OvBHiCttjLq7wFdKSm07rlEhq5OSYPemtI=
 github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.2.0 h1:Hbg2NidpLE8veEBkEZTL3CvlkUIVzuU9jDplZO54c48=