[#94] object: Generate protobufs for Patch method

* Generate protobufs for patch method;
* Create marshalers, unmarshalers, converters for gererated types;
* Add unit-tests.

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

object/types.go

@@ -349,6 +349,38 @@ type PutSingleResponse struct {
 	session.ResponseHeaders
 }
 
+type PatchRequestBodyPatch struct {
+	Range *Range
+
+	Chunk []byte
+}
+
+type PatchRequestBody struct {
+	Address *refs.Address
+
+	NewAttributes []Attribute
+
+	ReplaceAttributes bool
+
+	Patch *PatchRequestBodyPatch
+}
+
+type PatchRequest struct {
+	Body *PatchRequestBody
+
+	session.RequestHeaders
+}
+
+type PatchResponseBody struct {
+	ObjectID *refs.ObjectID
+}
+
+type PatchResponse struct {
+	Body *PatchResponseBody
+
+	session.ResponseHeaders
+}
+
 const (
 	TypeRegular Type = iota
 	TypeTombstone