- Set version constraint to 5.6+ (dropped 5.5 completely)

- Using fixed PHPUnit for travis
- Fixed Color::parseInt and Color::toInt. RgbColors will now always generate an int with alpha set to 0xff (255) and using parseInt will always return an RgbaColor

.travis.yml

@@ -5,11 +5,15 @@ git:
   depth: 5
 
 php:
+    - 5.6
     - 7.0
 
 before_script:
     - if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then phpenv config-rm xdebug.ini; fi;
 
 install:
     - composer self-update
-    - composer install --no-dev
+    - composer install
+
+script:
+    - vendor/bin/phpunit

composer.json

@@ -17,9 +17,8 @@
         "source": "https://github.com/Talesoft/phim",
         "docs": "http://phim.talesoft.codes/docs"
     },
-    "minimum-stability": "dev",
     "require": {
-        "php": ">=5.5.0"
+        "php": ">=5.6"
     },
     "autoload": {
         "psr-4": {
@@ -33,5 +32,8 @@
         "gd": "for image processing with GD",
         "imagick": "for image processing with Imagick",
         "symfony/mbstring-polyfill": "if youre lacking the mbstring extension or can't install it"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^6.1"
     }
 }