Update from /github.com/vbauerster/mpb/v7 to /v8

Also update to c/image after https://github.com/containers/image/pull/1821 ,
so that we don't ship two versions of the package simultaneously.

[NO NEW TESTS NEEDED]

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

vendor/github.com/vbauerster/mpb/v8/internal/width.go

@@ -0,0 +1,10 @@
+package internal
+
+// CheckRequestedWidth checks that requested width doesn't overflow
+// available width
+func CheckRequestedWidth(requested, available int) int {
+	if requested < 1 || requested >= available {
+		return available
+	}
+	return requested
+}