fix(lint): be compliant with golangci-lint

pkg/hub/errors.go

@@ -3,11 +3,11 @@ package hub
 import "errors"
 
 var (
-	errorFailedToCreateRequest    = errors.New("failed to create http request")
-	errorFailedToParseJSON        = errors.New("failed to parse json")
-	errorFailedToParseURL         = errors.New("failed to parse url")
-	errorFailedToSendRequest      = errors.New("failed to send http request")
-	errorNoNamespaceDefined       = errors.New("no Namespace defined")
-	errorNoRepositoryDefined      = errors.New("no Repository defined")
-	errorUnexpectedHTTPStatuscode = errors.New("unexpected HTTP-Statuscode")
+	errFailedToCreateRequest    = errors.New("failed to create http request")
+	errFailedToParseJSON        = errors.New("failed to parse json")
+	errFailedToParseURL         = errors.New("failed to parse url")
+	errFailedToSendRequest      = errors.New("failed to send http request")
+	errNoNamespaceDefined       = errors.New("no Namespace defined")
+	errNoRepositoryDefined      = errors.New("no Repository defined")
+	errUnexpectedHTTPStatuscode = errors.New("unexpected HTTP-Statuscode")
 )