Add git source to package.json

package.json

@@ -8,5 +8,9 @@
   "license": "BSD-3-Clause",
   "licenseFile": "LICENSE",
   "dependencies": {
+  },
+  "source": {
+    "git": "https://git.ps.informatik.uni-kiel.de/jsi1/icurry.git",
+    "tag": "$version"
   }
 }