Add postversion script to push to npm after version releases.

package.json

@@ -8,16 +8,33 @@
   },
   "browserify": {
     "transform": [
-      ["babelify", { "presets": ["es2015"] }],
-      ["stringify", { "extensions": [".html"] }],
-      ["sassify"]
+      [
+        "babelify",
+        {
+          "presets": [
+            "es2015"
+          ]
+        }
+      ],
+      [
+        "stringify",
+        {
+          "extensions": [
+            ".html"
+          ]
+        }
+      ],
+      [
+        "sassify"
+      ]
     ]
   },
   "scripts": {
     "dev": "webpack --progress --colors --watch --config webpack/webpack.config.js --devtool sourcemap",
     "build": "npm run build-js && npm run build-css",
     "build-js": "webpack --config ./webpack/webpack.config.js --devtool sourcemap && webpack --config ./webpack/webpack.config.min.js",
-    "build-css": "node-sass src/dat/gui/style.scss build/dat.gui.css"
+    "build-css": "node-sass src/dat/gui/style.scss build/dat.gui.css",
+    "postversion": "git push && git push --tags && npm publish"
   },
   "repository": {
     "type": "git",