Prepare for minor release.

Author: mbostock

README.md

@@ -36,10 +36,10 @@ Selections are immutable. All selection methods that affect which elements are s
 
 ## Installing
 
-If you use NPM, `npm install d3-selection`. Otherwise, download the [latest release](https://github.com/d3/d3-selection/releases/latest). You can also load directly from [d3js.org](https://d3js.org), either as a [standalone library](https://d3js.org/d3-selection.v0.8.min.js) or as part of [D3 4.0](https://github.com/d3/d3). AMD, CommonJS, and vanilla environments are supported. In vanilla, a `d3` global is exported:
+If you use NPM, `npm install d3-selection`. Otherwise, download the [latest release](https://github.com/d3/d3-selection/releases/latest). You can also load directly from [d3js.org](https://d3js.org), either as a [standalone library](https://d3js.org/d3-selection.v0.9.min.js) or as part of [D3 4.0](https://github.com/d3/d3). AMD, CommonJS, and vanilla environments are supported. In vanilla, a `d3` global is exported:
 
 ```html
-<script src="https://d3js.org/d3-selection.v0.8.min.js"></script>
+<script src="https://d3js.org/d3-selection.v0.9.min.js"></script>
 <script>
 
 var div = d3.selectAll("div");

package.json

@@ -25,7 +25,7 @@
     "pretest": "rm -rf build && mkdir build && rollup --banner \"$(preamble)\" -f umd -n d3 -o build/d3-selection.js -- index.js",
     "test": "tape 'test/**/*-test.js' && eslint index.js src",
     "prepublish": "npm run test && uglifyjs --preamble \"$(preamble)\" build/d3-selection.js -c -m -o build/d3-selection.min.js",
-    "postpublish": "VERSION=`node -e 'console.log(require(\"./package.json\").version)'`; git push && git push --tags && cp build/d3-selection.js ../d3.github.com/d3-selection.v0.8.js && cp build/d3-selection.min.js ../d3.github.com/d3-selection.v0.8.min.js && cd ../d3.github.com && git add d3-selection.v0.8.js d3-selection.v0.8.min.js && git commit -m \"d3-selection ${VERSION}\" && git push && cd - && zip -j build/d3-selection.zip -- LICENSE README.md build/d3-selection.js build/d3-selection.min.js"
+    "postpublish": "VERSION=`node -e 'console.log(require(\"./package.json\").version)'`; git push && git push --tags && cp build/d3-selection.js ../d3.github.com/d3-selection.v0.9.js && cp build/d3-selection.min.js ../d3.github.com/d3-selection.v0.9.min.js && cd ../d3.github.com && git add d3-selection.v0.9.js d3-selection.v0.9.min.js && git commit -m \"d3-selection ${VERSION}\" && git push && cd - && zip -j build/d3-selection.zip -- LICENSE README.md build/d3-selection.js build/d3-selection.min.js"
   },
   "devDependencies": {
     "eslint": "2",