Update non-essential deps

Author: vidartf

.gitignore

@@ -34,3 +34,4 @@ docs/source/_static/three.js
 docs/source/examples/img
 
 js/lab-dist
+js/package-lock.json

js/package.json

@@ -2,53 +2,55 @@
   "name": "jupyter-threejs",
   "version": "2.1.1",
   "description": "jupyter - threejs bridge",
-  "author": "Jupyter-Threejs development team",
-  "license": "BSD-3-Clause",
-  "main": "dist/index.js",
+  "keywords": [
+    "jupyterlab",
+    "extension",
+    "jupyterlab-extension",
+    "notebook",
+    "jupyter",
+    "widgets",
+    "three"
+  ],
   "repository": {
     "type": "git",
     "url": "https://github.com/jupyter-widgets/pythreejs.git"
   },
+  "license": "BSD-3-Clause",
+  "author": "Jupyter-Threejs development team",
+  "main": "dist/index.js",
   "scripts": {
-    "clean": "rimraf dist && rimraf ../pythreejs/static && rimraf lab-dist && node ./scripts/clean-generated-files.js",
+    "autogen": "npm run autogen:shaders && npm run autogen:wrappers",
     "autogen:enums": "node ./scripts/generate-enums.js",
     "autogen:shaders": "node ./scripts/generate-shader-utils.js",
     "autogen:wrappers": "node ./scripts/generate-wrappers.js",
-    "autogen": "npm run autogen:shaders && npm run autogen:wrappers",
+    "build:all": "npm run build:labextension",
     "build:bundles": "webpack -d && node ./scripts/post-build.js --debug",
     "build:bundles-prod": "webpack -p && node ./scripts/post-build.js",
     "build:labextension": "rimraf lab-dist && mkdirp lab-dist && cd lab-dist && npm pack ..",
-    "build:all": "npm run build:labextension",
-    "prepare": "npm run autogen",
+    "clean": "rimraf dist && rimraf ../pythreejs/static && rimraf lab-dist && node ./scripts/clean-generated-files.js",
     "prepack": "npm run build:bundles-prod",
+    "prepare": "npm run autogen",
+    "update:deps": "update-dependency --minimal --regex \"^(?!@jupyter-widgets|three)\"",
     "watch": "webpack -d -w"
   },
-  "devDependencies": {
-    "eslint": "^5.16.0",
-    "fs-extra": "^7.0.1",
-    "glob": "^7.1.4",
-    "handlebars": "^4.1.2",
-    "mkdirp": "^0.5.1",
-    "rimraf": "^2.6.3",
-    "webpack": "^4.34.0",
-    "webpack-cli": "^3.3.4"
-  },
   "dependencies": {
     "@jupyter-widgets/base": "^1.2.5 || ^2.0.0",
     "bluebird": "^3.5.5",
-    "jupyter-dataserializers": "^2.1.0",
+    "jupyter-dataserializers": "^2.2.0",
     "three": "^0.97.0",
     "underscore": "^1.8.3"
   },
-  "keywords": [
-    "jupyterlab",
-    "extension",
-    "jupyterlab-extension",
-    "notebook",
-    "jupyter",
-    "widgets",
-    "three"
-  ],
+  "devDependencies": {
+    "@jupyterlab/buildutils": "^2.0.2",
+    "eslint": "^6.8.0",
+    "fs-extra": "^8.1.0",
+    "glob": "^7.1.4",
+    "handlebars": "^4.1.2",
+    "mkdirp": "^1.0.3",
+    "rimraf": "^3.0.2",
+    "webpack": "^4.34.0",
+    "webpack-cli": "^3.3.4"
+  },
   "jupyterlab": {
     "extension": "src/jupyterlab-plugin",
     "discovery": {