Update composer.json

Author: msch-alpgis

composer.json

@@ -25,8 +25,5 @@
   },
   "require-dev": {
     "phpunit/phpunit": "^5.5|^6.5"
-  },
-  "replace": {
-    "phenx/php-svg-lib": "0.3.*"
   }
 }