Document and explain the 4.1 requirement changes

Author: stronk7

.travis.dist.yml

@@ -1,11 +1,11 @@
 language: php
 
 addons:
-  postgresql: "12"
+  postgresql: "13"
   apt:
     packages:
-      - postgresql-12
-      - postgresql-client-12
+      - postgresql-13
+      - postgresql-client-13
 
 services:
   - mysql
@@ -23,7 +23,7 @@ php:
 
 env:
  global:
-  - PGVER=12
+  - PGVER=13
   - MOODLE_BRANCH=MOODLE_311_STABLE
  matrix:
   - DB=pgsql

docs/CHANGELOG.md

@@ -9,6 +9,15 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 The format of this change log follows the advice given at [Keep a CHANGELOG](http://keepachangelog.com).
 
 ## [Unreleased]
+### Changed
+- Updated [gha.dist.yml](https://github.com/moodlehq/moodle-plugin-ci/blob/master/gha.dist.yml) and
+  [.travis.dist.yml](https://github.com/moodlehq/moodle-plugin-ci/blob/master/.travis.dist.yml)
+  (and documentation) to fulfil [Moodle 4.2 new requirements](https://tracker.moodle.org/browse/MDL-74905).
+- ACTION REQUIRED: Review existing integrations running tests against master (4.2dev). There are a few Moodle 4.2 new requirements:
+  - PHP 8.0 is required (instead of 7.4).
+  - PostgreSQL 13 is required (instead of 12).
+  - MariaDB 10.6 is required (instead of 10.4).
+  - MySQL 8 is required (instead of 5.7).
 
 ## [3.4.2] - 2022-10-18
 ### Changed

docs/GHAFileExplained.md

@@ -31,7 +31,7 @@ jobs:
     # DB services you need for testing.
     services:
       postgres:
-        image: postgres:12
+        image: postgres:13
         env:
           POSTGRES_USER: 'postgres'
           POSTGRES_HOST_AUTH_METHOD: 'trust'

docs/TravisFileExplained.md

@@ -13,11 +13,11 @@ language: php
 
 # Installs the updated version of PostgreSQL and extra APT packages.
 addons:
-  postgresql: "12"
+  postgresql: "13"
   apt:
     packages:
-      - postgresql-12
-      - postgresql-client-12
+      - postgresql-13
+      - postgresql-client-13
 
 # Ensure DB and docker services are running.
 services:
@@ -45,7 +45,7 @@ env:
 # used, because, for PG 11 and up, both the user and the port were
 # changed by Travis. With that variable, the tool will switch to
 # socketed connections instead of localhost ones.
-  - PGVER=12
+  - PGVER=13
 # This line determines which version branch of Moodle to test against.
   - MOODLE_BRANCH=MOODLE_311_STABLE
 # This matrix is used for testing against multiple databases.  So for

gha.dist.yml

@@ -8,7 +8,7 @@ jobs:
 
     services:
       postgres:
-        image: postgres:12
+        image: postgres:13
         env:
           POSTGRES_USER: 'postgres'
           POSTGRES_HOST_AUTH_METHOD: 'trust'