Update dependencies.

package.json

@@ -40,7 +40,7 @@
   },
   "dependencies": {
     "d3-array": "0.7.1",
-    "d3-axis": "0.2.3",
+    "d3-axis": "0.3.0",
     "d3-collection": "0.1.2",
     "d3-color": "0.4.2",
     "d3-dispatch": "0.4.2",
@@ -55,12 +55,12 @@
     "d3-random": "0.2.1",
     "d3-request": "0.4.3",
     "d3-scale": "0.6.2",
-    "d3-selection": "0.6.12",
+    "d3-selection": "0.7.0",
     "d3-shape": "0.5.1",
     "d3-time": "0.2.1",
     "d3-time-format": "0.3.1",
     "d3-timer": "0.4.1",
-    "d3-transition": "0.1.3",
+    "d3-transition": "0.2.0",
     "d3-voronoi": "0.3.2"
   }
 }