Updated deps.

Author: ctubio

composer.json

@@ -15,14 +15,14 @@
     "issues": "https://github.com/ctubio/php-proxy-keyserver/issues"
   },
   "require": {
-    "php": "~5.5",
+    "php": "~5.6",
     "monolog/monolog": "~1.13",
     "jenssegers/proxy": "2.*",
     "dflydev/apache-mime-types": "~1.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "~4.4",
-    "satooshi/php-coveralls": "~0.6"
+    "phpunit/phpunit": "~5.0",
+    "satooshi/php-coveralls": "~1.0"
   },
   "autoload": {
     "psr-4": {