Downgrade aws sdk

Changes to the STS Regional Flags in https://github.com/aws/aws-sdk-go/releases/tag/v1.25.18 are causing issues in assumeRoleFromSession

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/99designs/keyring v1.1.3
 	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
 	github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d // indirect
-	github.com/aws/aws-sdk-go v1.25.19
+	github.com/aws/aws-sdk-go v1.25.17
 	github.com/gopherjs/gopherjs v0.0.0-20190430165422-3e4dfb77656c // indirect
 	github.com/keybase/go-keychain v0.0.0-20191022214133-1c06e666bc46 // indirect
 	github.com/mitchellh/go-homedir v1.1.0

go.sum

@@ -6,8 +6,8 @@ github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 h1:JYp7IbQjafo
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d h1:UQZhZ2O0vMHr2cI+DC1Mbh0TJxzA3RcLoMsFw+aXw7E=
 github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
-github.com/aws/aws-sdk-go v1.25.19 h1:sp3xP91qIAVhWufyn9qM6Zhhn6kX06WJQcmhRj7QTXc=
-github.com/aws/aws-sdk-go v1.25.19/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
+github.com/aws/aws-sdk-go v1.25.17 h1:qIyijzjkBhVzM2+vnsP53T2zoTHeoRRnfQR2kEkBStA=
+github.com/aws/aws-sdk-go v1.25.17/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/danieljoos/wincred v1.0.2 h1:zf4bhty2iLuwgjgpraD2E9UbvO+fe54XXGJbOwe23fU=
 github.com/danieljoos/wincred v1.0.2/go.mod h1:SnuYRW9lp1oJrZX/dXJqr0cPK5gYXqx3EJbmjhLdK9U=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=