Prep. for 8.16.0

Author: ezimuel

.buildkite/pipeline.yml

@@ -7,7 +7,7 @@ steps:
     env:
       PHP_VERSION: "{{ matrix.php }}"
       TEST_SUITE: "{{ matrix.suite }}"
-      STACK_VERSION: 8.14.0-SNAPSHOT
+      STACK_VERSION: 8.16.0-SNAPSHOT
     matrix:
       setup:
         suite:

.github/workflows/test.yml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         php-version: [7.4, 8.0, 8.1, 8.2, 8.3, 8.4]
         os: [ubuntu-latest]
-        es-version: [8.14-SNAPSHOT]
+        es-version: [8.16-SNAPSHOT]
 
     steps:
     - name: Checkout