Update to cobra 1.1.1 (hetznercloud#282)

Since this is released we no longer need to use cobra's master branch
for our shell completion to work.

CHANGES.md

@@ -1,6 +1,6 @@
 # Changes
 
-As of v1.15.0 we expose the Changelog only in the [Github Releases section](https://github.com/hetznercloud/cli/releases). 
+As of v1.15.0 we expose the Changelog only in the [Github Releases section](https://github.com/hetznercloud/cli/releases).
 
 ## v1.14.0
 

go.mod

@@ -5,13 +5,11 @@ require (
 	github.com/dustin/go-humanize v1.0.0
 	github.com/fatih/structs v1.1.0
 	github.com/hetznercloud/hcloud-go v1.22.0
-	github.com/kr/pretty v0.1.0 // indirect
 	github.com/pelletier/go-toml v1.8.0
-	github.com/spf13/cobra v1.0.1-0.20200826151851-02a0d2fbc9e6
+	github.com/spf13/cobra v1.1.1
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.6.1
 	golang.org/x/crypto v0.0.0-20200728195943-123391ffb6de
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
 )
 
 go 1.15