Update dependencies

Among others, this updates minio-go, so that the new "eu-west-3" zone
for AWS is supported.

vendor/github.com/ncw/swift/swift.go

@@ -297,6 +297,7 @@ var (
 	TimeoutError        = newError(408, "Timeout when reading or writing data")
 	Forbidden           = newError(403, "Operation forbidden")
 	TooLargeObject      = newError(413, "Too Large Object")
+	RateLimit           = newError(498, "Rate Limit")
 
 	// Mappings for authentication errors
 	authErrorMap = errorMap{
@@ -311,6 +312,7 @@ var (
 		403: Forbidden,
 		404: ContainerNotFound,
 		409: ContainerNotEmpty,
+		498: RateLimit,
 	}
 
 	// Mappings for object errors
@@ -321,6 +323,7 @@ var (
 		404: ObjectNotFound,
 		413: TooLargeObject,
 		422: ObjectCorrupted,
+		498: RateLimit,
 	}
 )