drop PHP 5.3 and set required PHP version is 5.4+.

Author: peter279k

.travis.yml

@@ -1,22 +1,13 @@
 language: php
-matrix:
-  include:
-    - php: 5.3
-      dist: precise
-    - php: 5.4
-      dist: trusty
-    - php: 5.5
-      dist: trusty
-    - php: 5.6
-      dist: trusty
-    - php: 7.0
-      dist: trusty
-    - php: 7.1
-      dist: trusty
-    - php: 7.2
-      dist: trusty
-    - php: nightly
-      dist: trusty
+
+php:
+  - 5.4
+  - 5.5
+  - 5.6
+  - 7.0
+  - 7.1
+  - 7.2
+  - nightly
 
 before_script:
   - composer install

composer.json

@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": ">=5.3.0",
+        "php": ">=5.4.0",
         "ext-gd": "*",
         "ext-fileinfo": "*"
     },