Remove npm from dependancies

Author: KoRiGaN

package.json

@@ -16,8 +16,7 @@
     "url": "git://github.com/KoRiGaN/Vue2Leaflet.git"
   },
   "dependencies": {
-    "leaflet": "^1.3.1",
-    "npm": "^5.8.0"
+    "leaflet": "^1.3.1"
   },
   "peerDependencies": {
     "vue": "^2.5.3"