add npm to package.json

debian/patches/0420-use-system-libs.patch

@@ -1,7 +1,10 @@
 --- a/package.json
 +++ b/package.json
-@@ -15,56 +15,28 @@
+@@ -13,58 +13,31 @@
+     "webpack-prod": "NODE_ENV=production webpack --config config/webpack.config.js"
+   },
    "dependencies": {
++    "npm": "^5.6.0",
      "autosize": "^4.0.0",
      "axios": "^0.17.1",
 -    "babel-core": "^6.26.0",
@@ -57,7 +60,7 @@
      "react-dev-utils": "^0.5.2",
      "sanitize-html": "^1.16.1",
      "select2": "3.5.2-browserify",
-@@ -75,8 +47,6 @@
+@@ -75,8 +48,6 @@
      "three-orbit-controls": "^82.1.0",
      "three-stl-loader": "^1.0.4",
      "timeago.js": "^3.0.2",
@@ -66,7 +69,7 @@
      "visibilityjs": "^1.2.4",
      "vue": "^2.5.13",
      "vue-loader": "^13.7.0",
-@@ -84,8 +54,6 @@
+@@ -84,8 +55,6 @@
      "vue-router": "^3.0.1",
      "vue-template-compiler": "^2.5.13",
      "vuex": "^3.0.1",