CI tests PG18 (std-all) (#294)

Author: dmitry-lipetsk

.travis.yml

@@ -35,6 +35,7 @@ env:
     - TEST_PLATFORM=std PYTHON_VERSION=3 PG_VERSION=11
     - TEST_PLATFORM=std PYTHON_VERSION=3 PG_VERSION=10
     - TEST_PLATFORM=std-all PYTHON_VERSION=3 PG_VERSION=17
+    - TEST_PLATFORM=std-all PYTHON_VERSION=3 PG_VERSION=18
     - TEST_PLATFORM=ubuntu_24_04 PYTHON_VERSION=3 PG_VERSION=17
     - TEST_PLATFORM=altlinux_10 PYTHON_VERSION=3 PG_VERSION=17
     - TEST_PLATFORM=altlinux_11 PYTHON_VERSION=3 PG_VERSION=17