Adding upstream version 0.8.9.

Signed-off-by: Daniel Baumann <daniel@debian.org>

internal/testutils/iofaker.go

@@ -0,0 +1,14 @@
+package testutils
+
+import (
+	"io"
+)
+
+type ioFaker struct {
+	io.ReadWriter
+}
+
+// Close is just a dummy function to implement the io.Closer interface.
+func (iof ioFaker) Close() error {
+	return nil
+}