Introduce Graql Update query into proto

Author: haikalpribadi

protobuf/query.proto

@@ -30,27 +30,29 @@ message Query {
     message Req {
         Options options = 1;
         oneof req {
-            Delete.Req delete_req = 100;
-            Define.Req define_req = 101;
-            Undefine.Req undefine_req = 102;
-            Match.Req match_req = 103;
-            MatchAggregate.Req match_aggregate_req = 104;
-            MatchGroup.Req match_group_req = 105;
-            MatchGroupAggregate.Req match_group_aggregate_req = 106;
-            Insert.Req insert_req = 107;
+            Define.Req define_req = 100;
+            Undefine.Req undefine_req = 101;
+            Match.Req match_req = 102;
+            MatchAggregate.Req match_aggregate_req = 103;
+            MatchGroup.Req match_group_req = 104;
+            MatchGroupAggregate.Req match_group_aggregate_req = 105;
+            Insert.Req insert_req = 106;
+            Delete.Req delete_req = 107;
+            Update.Req update_req = 108;
         }
     }
 
     message Res {
         oneof res {
-            Delete.Res delete_res = 100;
-            Define.Res define_res = 101;
-            Undefine.Res undefine_res = 102;
-            Match.Res match_res = 103;
-            MatchAggregate.Res match_aggregate_res = 104;
-            MatchGroup.Res match_group_res = 105;
-            MatchGroupAggregate.Res match_group_aggregate_res = 106;
-            Insert.Res insert_res = 107;
+            Define.Res define_res = 100;
+            Undefine.Res undefine_res = 101;
+            Match.Res match_res = 102;
+            MatchAggregate.Res match_aggregate_res = 103;
+            MatchGroup.Res match_group_res = 104;
+            MatchGroupAggregate.Res match_group_aggregate_res = 105;
+            Insert.Res insert_res = 106;
+            Delete.Res delete_res = 107;
+            Update.Res update_res = 108;
         }
     }
 
@@ -109,6 +111,15 @@ message Query {
         message Res {}
     }
 
+    message Update {
+        message Req {
+            string query = 1;
+        }
+        message Res {
+            repeated ConceptMap answers = 1;
+        }
+    }
+
     message Define {
         message Req {
             string query = 1;