Github actions: Remove build with PostgreSQL 9.5

PostgreSQL 9.5 has been marked as unsupported for a while, both by the
PostgreSQL itself as by us. This removes the build on Github action
which is failing now.

Author: joto

.github/workflows/ci.yml

@@ -39,16 +39,15 @@ jobs:
         env:
           PGHOST: /tmp
 
-
-  ubuntu18-pg95-gcc7-jit:
+  ubuntu18-pg96-gcc7-jit:
     runs-on: ubuntu-18.04
 
     env:
       CC: gcc-7
       CXX: g++-7
       LUA_VERSION: 5.3
       LUAJIT_OPTION: ON
-      POSTGRESQL_VERSION: 9.5
+      POSTGRESQL_VERSION: 9.6
       POSTGIS_VERSION: 2.4
       BUILD_TYPE: Release
 

CMakeLists.txt

@@ -66,10 +66,10 @@ if (NOT WIN32 AND NOT APPLE)
     set(PostgreSQL_TYPE_INCLUDE_DIR /usr/include)
 endif()
 
-set(MINIMUM_POSTGRESQL_SERVER_VERSION "9.5")
-set(MINIMUM_POSTGRESQL_SERVER_VERSION_NUM "90500")
+set(MINIMUM_POSTGRESQL_SERVER_VERSION "9.6")
+set(MINIMUM_POSTGRESQL_SERVER_VERSION_NUM "90600")
 
-set(PostgreSQL_ADDITIONAL_VERSIONS "14" "13" "12" "11" "10" "9.6" "9.5")
+set(PostgreSQL_ADDITIONAL_VERSIONS "15" "14" "13" "12" "11" "10" "9.6")
 
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 # Version