Drop support for PHP 7.1

.travis.yml

@@ -26,7 +26,6 @@ script:
 jobs:
     fast_finish: true
     include:
-        - php: 7.1
         - php: 7.2
         - php: 7.3
         - php: 7.4

CHANGELOG

@@ -5,6 +5,7 @@
  * Make round brackets optional for one argument tests like "same as" or "divisible by"
  * Add support for ES2015 style object initialisation shortcut { a } is the same as { 'a': a }
  * Fix filter(), map(), and reduce() to throw a RuntimeError instead of a PHP TypeError
+ * Drop PHP 7.1 support
 
 # 1.43.1 (2020-08-05)
 

composer.json

@@ -24,7 +24,7 @@
         }
     ],
     "require": {
-        "php": ">=7.1.3",
+        "php": ">=7.2.5",
         "symfony/polyfill-ctype": "^1.8"
     },
     "require-dev": {

doc/intro.rst

@@ -26,7 +26,7 @@ Slim, Yii, Laravel, and Codeigniter — just to name a few.
 Prerequisites
 -------------
 
-Twig 1.x needs at least **PHP 7.1.3** to run.
+Twig 1.x needs at least **PHP 7.2.5** to run.
 
 Installation
 ------------