New task for bundling dependencies

package.json

@@ -32,7 +32,6 @@
   ],
   "dependencies": {
     "async": "2.4.0",
-    "browserify": "14.3.0",
     "closure-util": "1.19.0",
     "derequire": "2.0.6",
     "fs-extra": "3.0.0",
@@ -46,6 +45,10 @@
     "pbf": "3.0.5",
     "pixelworks": "1.1.0",
     "rbush": "2.0.1",
+    "rollup": "^0.41.6",
+    "rollup-plugin-cleanup": "^1.0.0",
+    "rollup-plugin-commonjs": "^8.0.2",
+    "rollup-plugin-node-resolve": "^3.0.0",
     "temp": "0.8.3",
     "@mapbox/vector-tile": "1.3.0",
     "walk": "2.3.9"
@@ -102,24 +105,20 @@
   },
   "ext": [
     {
-      "module": "rbush",
-      "browserify": true
+      "module": "rbush"
     },
     {
       "module": "pbf",
-      "name": "PBF",
-      "browserify": true
+      "name": "PBF"
     },
     {
       "module": "pixelworks",
-      "import": "Processor",
-      "browserify": true
+      "import": "Processor"
     },
     {
       "module": "@mapbox/vector-tile",
       "name": "vectortile",
-      "import": "VectorTile",
-      "browserify": true
+      "import": "VectorTile"
     }
   ]
 }