Updated and loosened dependency versions.

Author: r4j4h

composer.json

@@ -15,10 +15,10 @@
         "guzzle/guzzle": "~3.9"
     },
     "require-dev": {
-        "phpunit/phpunit": "4.2.*",
-        "phing/phing": "2.*",
-        "phpmd/phpmd": "2.1.1",
-        "phploc/phploc": "~2.0"
+        "phpunit/phpunit": "~4",
+        "phing/phing": "~2",
+        "phpmd/phpmd": "~2",
+        "phploc/phploc": "~2"
     },
     "autoload": {
         "psr-4": {