Bump a few libs to latest tagged versions

vendor/github.com/docker/distribution/errors.go

@@ -16,6 +16,15 @@ var ErrManifestNotModified = errors.New("manifest not modified")
 // performed
 var ErrUnsupported = errors.New("operation unsupported")
 
+// ErrTagUnknown is returned if the given tag is not known by the tag service
+type ErrTagUnknown struct {
+	Tag string
+}
+
+func (err ErrTagUnknown) Error() string {
+	return fmt.Sprintf("unknown tag=%s", err.Tag)
+}
+
 // ErrRepositoryUnknown is returned if the named repository is not known by
 // the registry.
 type ErrRepositoryUnknown struct {
@@ -89,3 +98,14 @@ type ErrManifestBlobUnknown struct {
 func (err ErrManifestBlobUnknown) Error() string {
 	return fmt.Sprintf("unknown blob %v on manifest", err.Digest)
 }
+
+// ErrManifestNameInvalid should be used to denote an invalid manifest
+// name. Reason may set, indicating the cause of invalidity.
+type ErrManifestNameInvalid struct {
+	Name   string
+	Reason error
+}
+
+func (err ErrManifestNameInvalid) Error() string {
+	return fmt.Sprintf("manifest name %q invalid: %v", err.Name, err.Reason)
+}