vendor latest containers/image

containers/image moved to a new progress-bar library to fix various
issues related to overlapping bars and redundant entries.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

vendor/github.com/mattn/go-isatty/isatty_others.go

@@ -0,0 +1,10 @@
+// +build !windows
+// +build !appengine
+
+package isatty
+
+// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// terminal. This is also always false on this environment.
+func IsCygwinTerminal(fd uintptr) bool {
+	return false
+}