use version 2.0.0 of phar-io/version

Author: sebastianheuer

composer.json

@@ -26,7 +26,7 @@
     "php": "^5.6 || ^7.0",
     "ext-dom": "*",
     "ext-phar": "*",
-    "phar-io/version": "^1.0.1"
+    "phar-io/version": "2.0.0"
   },
   "autoload": {
     "classmap": [