polish package.json (#624)

package.json

@@ -14,7 +14,7 @@
   },
   "main": "index.js",
   "author": "Cassie Tarakajian",
-  "license": "MIT",
+  "license": "LGPL-2.1",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/catarak/p5.js-web-editor.git"
@@ -73,7 +73,6 @@
     "cors": "^2.8.1",
     "cross-env": "^5.1.3",
     "csslint": "^0.10.0",
-    "csurf": "^1.9.0",
     "decomment": "^0.8.7",
     "dotenv": "^2.0.0",
     "dropzone": "^4.3.0",
@@ -81,11 +80,8 @@
     "eslint-loader": "^1.3.0",
     "express": "^4.13.4",
     "express-session": "^1.13.0",
-    "file-type": "^3.8.0",
-    "fs-promise": "^1.0.0",
     "htmlhint": "^0.9.13",
     "is-url": "^1.2.2",
-    "is_js": "^0.9.0",
     "js-beautify": "^1.6.4",
     "jsdom": "^9.8.3",
     "jshint": "^2.9.4",
@@ -105,7 +101,6 @@
     "primer-tooltips": "^1.4.1",
     "project-name-generator": "^2.1.3",
     "prop-types": "^15.6.0",
-    "pug": "^2.0.0-beta6",
     "q": "^1.4.1",
     "react": "^16.2.0",
     "react-dom": "^16.2.0",