Lower requirement to PHPUnit >= 3.7

.travis.yml

@@ -7,6 +7,10 @@ matrix:
   include:
     - php: 5.6
       env: PHPUNIT_OPTIONS="--coverage-clover build/logs/clover.xml"
+    - php: 5.6
+      env: COMPOSER=composer41.json
+    - php: 5.6
+      env: COMPOSER=composer40.json
 
 install:
   - composer install

composer40.json

@@ -0,0 +1,28 @@
+{
+    "name": "elliotchance/concise",
+    "type": "library",
+    "description": "Concise is test framework for using plain English and minimal code, built on PHPUnit.",
+    "keywords": ["unit testing", "unit", "test", "phpunit", "tdd", "mocking", "mock", "assert", "assertion"],
+    "homepage": "https://github.com/elliotchance/concise",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Elliot Chance",
+            "email": "elliotchance@gmail.com"
+        }
+    ],
+    "bin": ["bin/concise"],
+    "require": {
+        "php": ">=5.3.0",
+        "kevinlebrun/colors.php": ">= 0.3.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "4.0.*",
+        "satooshi/php-coveralls": "dev-master"
+    },
+    "autoload": {
+        "psr-0": {
+        	"": [ "tests/", "src/" ]
+        }
+    }
+}