Update UglifyJS.

mbostock · mbostock · commit e859f59060b8 · 2017-03-10T10:17:11.000-08:00
diff --git a/package.json b/package.json
@@ -38,6 +38,6 @@
     "rollup": "0.41",
     "seedrandom": "2",
     "tape": "4",
-    "uglify-js": "2"
+    "uglify-js": "^2.8.11"
   }
 }
