Specify older versions of PHPUnit, Mockery & Coveralls to support PHP 5.4 and above

Author: maclof

composer.json

@@ -15,9 +15,9 @@
 		"illuminate/support": "~5.0"
 	},
 	"require-dev": {
-		"phpunit/phpunit" : "~4.0",
-		"mockery/mockery" : "~0.9",
-		"satooshi/php-coveralls": "~1.0"
+		"phpunit/phpunit" : "4.8.36",
+		"mockery/mockery" : "0.9.9",
+		"satooshi/php-coveralls": "1.0.1"
 	},
 	"autoload": {
 		"psr-4": {