Update composer.json

Author: msch-alpgis

composer.json

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