Increase PHP min version to 5.5

Signed-off-by: crynobone <crynobone@gmail.com>

.travis.yml

@@ -1,21 +1,20 @@
 language: php
 
 php:
-  - 5.4
   - 5.5
   - 5.6
   - 7.0
   - hhvm
 
 env:
   global:
-    - setup=simple
+    - setup=basic
     - coverage=no
 
 before_script:
   - travis_retry composer self-update
   - composer config discard-changes true
-  - if [[ $setup = 'simple' ]]; then travis_retry composer install --prefer-source --no-interaction; fi
+  - if [[ $setup = 'basic' ]]; then travis_retry composer install --prefer-source --no-interaction; fi
   - if [[ $setup = 'stable' ]]; then travis_retry composer update --prefer-source --no-interaction --prefer-stable; fi
   - if [[ $setup = 'lowest' ]]; then travis_retry composer update --prefer-source --no-interaction --prefer-lowest --prefer-stable; fi
   - if [[ $setup = 'coveralls' ]]; then travis_retry composer require "psr/log=1.0.0" "satooshi/php-coveralls=~0.6" "symfony/yaml=~2.0" --prefer-source --no-interaction --dev; fi
@@ -29,11 +28,11 @@ after_script:
 
 matrix:
   include:
-    - php: 5.4
+    - php: 5.5
       env: setup=lowest
-    - php: 5.4
+    - php: 5.5
       env: setup=stable
-    - php: 5.4
+    - php: 5.5
       env: setup=coveralls coverage=yes
   allow_failures:
     - env: setup=lowest

composer.json

@@ -16,7 +16,7 @@
 		}
 	},
 	"require": {
-		"php": ">=5.4.0",
+		"php": ">=5.5.0",
 		"orchestra/publisher": "3.1.*",
 		"orchestra/support-core": "3.1.*"
 	},