Bump version after release

Signed-off-by: Larry Gritz <[email protected]>

Author: lgritz

CHANGES.md

@@ -1,6 +1,10 @@
 <!-- SPDX-License-Identifier: CC-BY-4.0 -->
 <!-- Copyright Contributors to the Open Shading Language Project. -->
 
+Release 1.13.8.0 -- 1 Apr? 2024 (compared to 1.13.7.0)
+--------------------------------------------------------
+
+
 Release 1.13.7.0 -- 1 Mar 2024 (compared to 1.13.6.1)
 --------------------------------------------------------
 - *fix*: Mute partio error prints [#1774](https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/1774) (by olegul)

CMakeLists.txt

@@ -4,7 +4,7 @@
 
 cmake_minimum_required (VERSION 3.15)
 
-set (OSL_VERSION "1.13.7.0")
+set (OSL_VERSION "1.13.8.0")
 set (OSL_VERSION_OVERRIDE "" CACHE STRING
      "Version override (use with caution)!")
 mark_as_advanced (OSL_VERSION_OVERRIDE)