chore(bazel): update gapic-generator-php to v1.4.0

Google APIs · copybara-github · commit f4bd29f87b26 · 2022-01-21T11:27:59.000-08:00
Changes include:
* manually fix field_behavior breaking changes
* support google.api.routing header injection

PiperOrigin-RevId: 423367804
diff --git a/WORKSPACE b/WORKSPACE
@@ -303,7 +303,7 @@ yarn_install(
 ##############################################################################
 
 # PHP micro-generator
-_gapic_generator_php_version = "1.3.1"
+_gapic_generator_php_version = "1.4.0"
 
 http_archive(
     name = "gapic_generator_php",
