Update dependencies.

package.json

@@ -43,7 +43,7 @@
     "d3-axis": "0.2.3",
     "d3-collection": "0.1.1",
     "d3-color": "0.4.1",
-    "d3-dispatch": "0.2.6",
+    "d3-dispatch": "0.3.0",
     "d3-dsv": "0.2.0",
     "d3-ease": "0.7.0",
     "d3-format": "0.5.1",
@@ -53,7 +53,7 @@
     "d3-quadtree": "0.2.1",
     "d3-queue": "2.0.2",
     "d3-random": "0.2.1",
-    "d3-request": "0.4.0",
+    "d3-request": "0.4.1",
     "d3-scale": "0.6.1",
     "d3-selection": "0.6.7",
     "d3-shape": "0.5.1",