[TASK] Drop support for PHP 5.5

.travis.yml

@@ -1,13 +1,8 @@
 sudo: false
 
-# This line allows compilation of PHP 5.5. It can be removed once we do not support
-# PHP 5.5 anymore.
-dist: trusty
-
 language: php
 
 php:
-- "5.5"
 - "5.6"
 - "7.0"
 - "7.1"

CHANGELOG.md

@@ -12,6 +12,8 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ### Deprecated
 
 ### Removed
+- Drop support for PHP 5.5
+  ([#690](https://github.com/MyIntervals/emogrifier/pull/690))
 
 ### Fixed
 

composer.json

@@ -37,7 +37,7 @@
         "source": "https://github.com/MyIntervals/emogrifier"
     },
     "require": {
-        "php": "^5.5.0 || ~7.0.0 || ~7.1.0 || ~7.2.0 || ~7.3.0",
+        "php": "^5.6.0 || ~7.0.0 || ~7.1.0 || ~7.2.0 || ~7.3.0",
         "ext-dom": "*",
         "ext-libxml": "*",
         "symfony/css-selector": "^3.4.0 || ^4.0.0"

config/php-cs-fixer.php

@@ -10,6 +10,8 @@
         [
             // copied from the TYPO3 Core
             '@PSR2' => true,
+            '@PHP56Migration' => true,
+            '@PHP56Migration:risky' => true,
             '@DoctrineAnnotation' => true,
             'no_leading_import_slash' => true,
             'no_trailing_comma_in_singleline_array' => true,