fix(deps): update module github.com/spf13/cobra to v1.9.1

Author: renovate[bot]

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/aevea/magefiles v0.0.0-20200424121010-0004d5a7a2fe
 	github.com/magefile/mage v1.10.0
 	github.com/pacedotdev/oto v0.3.0
-	github.com/spf13/cobra v1.0.0
+	github.com/spf13/cobra v1.9.1
 	github.com/stretchr/testify v1.6.1
 	golang.org/x/crypto v0.0.0-20200423211502-4bdfaf469ed5 // indirect
 	golang.org/x/net v0.0.0-20200421231249-e086a090c8fd // indirect