Travis: Expand supported PHP down to 5.4

PHP 5.4 is the minimum that PHPCS and WPCS support, so it would be nice to be able to say VIPCS supports the same minimum version of PHP.

Author: GaryJones

.travis.yml

@@ -1,6 +1,6 @@
 language: php
 os: linux
-dist: xenial
+dist: trusty
 
 env:
   # `master` is now 3.x.
@@ -13,6 +13,8 @@ cache:
     - $HOME/.cache/composer/files
 
 php:
+  - 5.4
+  - 5.5
   - 5.6
   - 7.0
   - 7.1
@@ -36,7 +38,7 @@ jobs:
   include:
 
     - stage: lint
-      php: 7.3
+      php: 7.4
       env: PHPCS_BRANCH="dev-master"
       before_install: phpenv config-rm xdebug.ini || echo 'No xdebug config.'
       install: skip
@@ -59,7 +61,7 @@ jobs:
             - libxml2-utils
 
     - stage: sniff
-      php: 7.3
+      php: 7.4
       env: PHPCS_BRANCH="dev-master"
       before_install: phpenv config-rm xdebug.ini || echo 'No xdebug config.'
       install: composer install --dev --no-suggest

README.md

@@ -15,6 +15,7 @@ Go to https://wpvip.com/documentation/phpcs-review-feedback/ to learn about why
 
 ## Minimal requirements
 
+* PHP 5.4+
 * [PHPCS 3.3.1+](https://github.com/squizlabs/PHP_CodeSniffer/releases)
 * [WPCS 2.*](https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/releases)
 

composer.json

@@ -15,14 +15,14 @@
 		}
 	],
 	"require": {
-		"php": ">=5.6",
+		"php": ">=5.4",
 		"squizlabs/php_codesniffer": "^3.5.5",
 		"wp-coding-standards/wpcs": "^2.3"
 	},
 	"require-dev": {
 		"dealerdirect/phpcodesniffer-composer-installer": "^0.7",
 		"phpcompatibility/php-compatibility": "^9",
-		"phpunit/phpunit": "^5 || ^6 || ^7"
+		"phpunit/phpunit": "^4 || ^5 || ^6 || ^7"
 	},
 	"suggest": {
 		"dealerdirect/phpcodesniffer-composer-installer": "^0.7 || This Composer plugin will manage the PHPCS 'installed_paths' automatically."