chore: lower minimum PHP to 8.2

PHPCompatibility reports zero 8.2 (or even 8.0) incompatibilities in the
codebase, so 8.3 was only a policy floor. Lower Requires PHP to 8.2 in the
plugin header and readme, set the PHPCompatibility testVersion to 8.2-, update
CONTRIBUTING, and run CI on a 8.2 + 8.3 matrix so the new floor is enforced.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: Michael Babcock

.github/workflows/ci.yml

@@ -8,13 +8,17 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php-version: [ '8.2', '8.3' ]
     steps:
       - uses: actions/checkout@v4
 
       - name: Set up PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.3'
+          php-version: ${{ matrix.php-version }}
           tools: composer
           coverage: none
 

CONTRIBUTING.md

@@ -40,4 +40,4 @@ install, so it is not part of CI. Run it locally before a release:
 - Where a security sniff flags a known-safe pattern (pre-escaped HTML,
   trusted table names, theme-provided markup), use a narrowly-scoped
   `phpcs:ignore` with a `--` reason rather than disabling the sniff globally.
-- Minimum PHP is 8.3; `PHPCompatibilityWP` enforces this.
+- Minimum PHP is 8.2; `PHPCompatibilityWP` enforces this.

outpost.php

@@ -6,7 +6,7 @@
  * Version:     1.1.0
  * Requires at least: 7.0
  * Tested up to: 7.0
- * Requires PHP: 8.3
+ * Requires PHP: 8.2
  * Author:      Community Access
  * Author URI:  https://community-access.org
  * License:     GPL-2.0-or-later

phpcs.xml.dist

@@ -31,7 +31,7 @@
 	</rule>
 
 	<!-- PHP version floor (matches Requires PHP). -->
-	<config name="testVersion" value="8.3-"/>
+	<config name="testVersion" value="8.2-"/>
 	<rule ref="PHPCompatibilityWP"/>
 
 	<!-- Plugin text domain. -->

readme.txt

@@ -3,7 +3,7 @@ Contributors: communityaccess
 Tags: mastodon, fediverse, email digest, accessibility, hashtag
 Requires at least: 7.0
 Tested up to: 7.0
-Requires PHP: 8.3
+Requires PHP: 8.2
 Stable tag: 1.1.0
 License: GPL-2.0-or-later
 License URI: https://www.gnu.org/licenses/gpl-2.0.html
@@ -74,7 +74,7 @@ Posts are fetched from the Mastodon API and cached for 60 minutes by default
   and unique element IDs for repeated feeds/forms.
 * Performance: paginated the subscribers admin screen; explicit option autoload.
 * Tooling: PHPCS (WordPress-Extra) + PHPCompatibility, CI, and a contributing
-  guide. Minimum PHP is now 8.3.
+  guide. Minimum PHP is now 8.2.
 
 = 1.0.0 =
 * Initial release: Mastodon hashtag feeds, subscribe forms, daily email digests,
@@ -83,4 +83,4 @@ Posts are fetched from the Mastodon API and cached for 60 minutes by default
 == Upgrade Notice ==
 
 = 1.1.0 =
-Adds account feeds and hardens security and accessibility. Requires PHP 8.3.
+Adds account feeds and hardens security and accessibility. Requires PHP 8.2.