Prepare for 13.6.0 Release (#1315)

Signed-off-by: Addisu Z. Taddese <addisu@openrobotics.org>
Signed-off-by: Steve Peters <scpeters@openrobotics.org>
Co-authored-by: Steve Peters <scpeters@openrobotics.org>

CMakeLists.txt

@@ -5,7 +5,7 @@ if(COMMAND CMAKE_POLICY)
   CMAKE_POLICY(SET CMP0004 NEW)
 endif(COMMAND CMAKE_POLICY)
 
-project (sdformat13 VERSION 13.5.0)
+project (sdformat13 VERSION 13.6.0)
 
 # The protocol version has nothing to do with the package version.
 # It represents the current version of SDFormat implemented by the software

Changelog.md

@@ -1,5 +1,35 @@
 ## libsdformat 13.X
 
+### libsdformat 13.6.0 (2023-08-30)
+
+1. Use relative path in an urdf include to avoid confusion between internal and system headers
+    * [Pull request #1259](https://github.com/gazebosim/sdformat/pull/1259)
+
+1. parser.cc update calls to use sdf::Errors output
+    * [Pull request #1294](https://github.com/gazebosim/sdformat/pull/1294)
+
+1. Fix deeply nested merge-include for custom parsed files
+    * [Pull request #1293](https://github.com/gazebosim/sdformat/pull/1293)
+
+1. Updated findfile() to search localpath first
+    * [Pull request #1292](https://github.com/gazebosim/sdformat/pull/1292)
+
+1. World requires a scene and atmosphere
+    * [Pull request #1308](https://github.com/gazebosim/sdformat/pull/1308)
+
+1. Infrastructure
+    * [Pull request #1307](https://github.com/gazebosim/sdformat/pull/1307)
+    * [Pull request #1306](https://github.com/gazebosim/sdformat/pull/1306)
+
+1. Remove robot not found error when parsing fails
+    * [Pull request #1290](https://github.com/gazebosim/sdformat/pull/1290)
+
+1. Make some sdfdbg messages sdfmsgs
+    * [Pull request #1288](https://github.com/gazebosim/sdformat/pull/1288)
+
+1. Minor clean up of tests
+    * [Pull request #1289](https://github.com/gazebosim/sdformat/pull/1289)
+
 ### libsdformat 13.5.0 (2023-05-18)
 
 1. Added projector Python wrapper