Update d3-drag.

README.md

@@ -7,7 +7,7 @@ This branch contains the prerelease of D3 4.0. This API is unstable and may chan
 If you use NPM, `npm install d3@next`. Otherwise, download the [latest release](https://github.com/mbostock/d3/releases/latest). The released bundle supports AMD, CommonJS, and vanilla environments. Create a custom build using [Rollup](https://github.com/rollup/rollup) or your preferred bundler. You can also load directly from [d3js.org](https://d3js.org):
 
 ```html
-<script src="https://d3js.org/d3.v4.0.0-alpha.37.min.js"></script>
+<script src="https://d3js.org/d3.v4.0.0-alpha.38.min.js"></script>
 ```
 
 ## API Reference

package.json

@@ -1,6 +1,6 @@
 {
   "name": "d3",
-  "version": "4.0.0-alpha.37",
+  "version": "4.0.0-alpha.38",
   "publishConfig": {
     "tag": "next"
   },
@@ -44,7 +44,7 @@
     "d3-collection": "0.1.2",
     "d3-color": "0.4.2",
     "d3-dispatch": "0.4.3",
-    "d3-drag": "0.1.1",
+    "d3-drag": "0.1.2",
     "d3-dsv": "0.3.2",
     "d3-ease": "0.7.0",
     "d3-force": "0.6.0",