[js] Bump minimum supported version of Node.js to 0.12.x

This is in response to the release of Node v4 (big version jump there)

https://nodejs.org/en/blog/release/v4.0.0/

Author: jleyba

javascript/node/selenium-webdriver/CHANGES.md

@@ -1,7 +1,8 @@
 ## v2.47.0-dev
 
-* Updated `ws` dependency from `^0.7.1` to `^0.8.0`
-
+* Updated `ws` dependency from `0.7.1` to `0.8.0`
+* Bumped minimum supported version of Node from `0.10.x` to `0.12.x`. This is
+  in accordance with the Node support policy established in `v2.45.0`.
 
 ## v2.46.1
 

javascript/node/selenium-webdriver/package.json

@@ -1,6 +1,6 @@
 {
   "name": "selenium-webdriver",
-  "version": "2.46.1",
+  "version": "2.47.0-dev",
   "description": "The official WebDriver JavaScript bindings from the Selenium project",
   "keywords": [
     "automation",
@@ -19,7 +19,7 @@
     "url": "https://github.com/SeleniumHQ/selenium.git"
   },
   "engines": {
-    "node": ">= 0.10.x"
+    "node": ">= 0.12.x"
   },
   "dependencies": {
     "adm-zip": "0.4.4",