chore(main): release 1.40.0 (#641)

release-please[bot] · web-flow · commit 1d3834d60b3f · 2025-12-04T10:45:15.000-08:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.40.0](https://github.com/googleapis/gax-php/compare/v1.39.0...v1.40.0) (2025-12-04)
+
+
+### Features
+
+* Add TransportCallMiddleware ([#640](https://github.com/googleapis/gax-php/issues/640)) ([a0f9d37](https://github.com/googleapis/gax-php/commit/a0f9d3740d62f6a776ac701631aa734046ceeb77))
+
 ## [1.39.0](https://github.com/googleapis/gax-php/compare/v1.38.2...v1.39.0) (2025-12-02)
 
 
diff --git a/VERSION b/VERSION
@@ -1 +1 @@
-1.39.0
+1.40.0
