Update to c/image v4.0.1

Update to use the correct c/image/v4 import path, work originally from
https://github.com/containers/skopeo/pull/733 by Valentin Rothberg <rothberg@redhat.com>.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

vendor/github.com/konsorten/go-windows-terminal-sequences/README.md

@@ -26,6 +26,7 @@ The tool is sponsored by the [marvin + konsorten GmbH](http://www.konsorten.de).
 We thank all the authors who provided code to this library:
 
 * Felix Kollmann
+* Nicolas Perraut
 
 ## License
 

vendor/github.com/konsorten/go-windows-terminal-sequences/sequences_dummy.go

@@ -0,0 +1,11 @@
+// +build linux darwin
+
+package sequences
+
+import (
+	"fmt"
+)
+
+func EnableVirtualTerminalProcessing(stream uintptr, enable bool) error {
+	return fmt.Errorf("windows only package")
+}