Update to UglifyJS v1.3.3.

Also, update node-canvas to v0.13.0 for better compatibility with
Node.js v0.8.x.

package.json

@@ -26,9 +26,9 @@
     "sizzle": "1.1.x"
   },
   "devDependencies": {
-    "uglify-js": "1.2.3",
+    "uglify-js": "1.3.3",
     "vows": "0.6.x",
-    "canvas": "0.12.1"
+    "canvas": "0.13.0"
   },
   "scripts": {
     "test": "./node_modules/vows/bin/vows"

src/package.js

@@ -15,9 +15,9 @@ require("util").puts(JSON.stringify({
     "sizzle": "1.1.x"
   },
   "devDependencies": {
-    "uglify-js": "1.2.3",
+    "uglify-js": "1.3.3",
     "vows": "0.6.x",
-    "canvas": "0.12.1" // for node-canvas example
+    "canvas": "0.13.0" // for node-canvas example
   },
   "scripts": {"test": "./node_modules/vows/bin/vows"}
 }, null, 2));