switch to go vendoring

vendor/github.com/shamaton/msgpack/v2/encode.go

@@ -0,0 +1,17 @@
+package msgpack
+
+import (
+	"github.com/shamaton/msgpack/v2/internal/encoding"
+)
+
+// MarshalAsMap encodes data as map format.
+// This is the same thing that StructAsArray sets false.
+func MarshalAsMap(v interface{}) ([]byte, error) {
+	return encoding.Encode(v, false)
+}
+
+// MarshalAsArray encodes data as array format.
+// This is the same thing that StructAsArray sets true.
+func MarshalAsArray(v interface{}) ([]byte, error) {
+	return encoding.Encode(v, true)
+}