Improved dependencies definition

Author: coa

composer.json

@@ -11,12 +11,11 @@
   "homepage": "https://github.com/ajant/SimpleArrayLibrary",
   "minimum-stability": "stable",
   "require": {
-    "php": ">=5.4.0",
-    "satooshi/php-coveralls": "~1.0"
+    "php": ">=5.4.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^4|^5",
-    "satooshi/php-coveralls": "v1.0.1"
+    "phpunit/phpunit": ">=4",
+    "satooshi/php-coveralls": "^1.0.1"
   },
   "autoload": {
     "psr-4": {