travis.yml: remove PHP 5.3,5.4,5.5

Author: ek9

.travis.yml

@@ -2,9 +2,6 @@ language: php
 
 matrix:
   include:
-    - php: 5.3
-    - php: 5.4
-    - php: 5.5
     - php: 5.6
     - php: 5.6
       env: deps=low

README.md

@@ -20,7 +20,7 @@ compatible version numbers for stable releases.
 
 ## Requirements
 
-- PHP 5.3.10+ / 7.0+
+- PHP 5.6+ / 7.0+
 - [Behat v3][3]
 - [Xdebug][5] or [phpdbg][6] extension enabled (PHP 7+ is required for code
   generation to work with [phpdbg][6]).

composer.json

@@ -25,7 +25,7 @@
         "docs": "https://github.com/leanphp/behat-code-coverage#behat-code-coverage"
     },
     "require": {
-        "php": ">=5.3.10",
+        "php": ">=5.6",
         "phpunit/php-code-coverage": "~4.0||~5.0",
         "behat/behat": "~3.0",
         "guzzlehttp/guzzle": "~3.0",