switch to go vendoring

vendor/github.com/shamaton/msgpack/v2/internal/common/common.go

@@ -0,0 +1,25 @@
+package common
+
+import "reflect"
+
+// Common is used encoding/decoding
+type Common struct {
+}
+
+// CheckField returns flag whether should encode/decode or not and field name
+func (c *Common) CheckField(field reflect.StructField) (bool, string) {
+	// A to Z
+	if c.isPublic(field.Name) {
+		if tag := field.Tag.Get("msgpack"); tag == "-" {
+			return false, ""
+		} else if len(tag) > 0 {
+			return true, tag
+		}
+		return true, field.Name
+	}
+	return false, ""
+}
+
+func (c *Common) isPublic(name string) bool {
+	return 0x41 <= name[0] && name[0] <= 0x5a
+}