feat(deps): add support for node@8

Fixes #2754

.travis.yml

@@ -4,6 +4,7 @@ node_js:
   - 4
   - 5
   - 7
+  - 8
 
 env:
   global:

appveyor.yml

@@ -6,6 +6,7 @@ environment:
     - nodejs_version: "5"
     - nodejs_version: "6"
     - nodejs_version: "7"
+    - nodejs_version: "8"
 
 matrix:
   fast_finish: true

docs/intro/01-installation.md

@@ -5,7 +5,7 @@ Karma runs on [Node.js] and is available as an [NPM] package.
 On Mac or Linux we recommend using [NVM](https://github.com/creationix/nvm). On Windows, download Node.js
 from [the official site](https://nodejs.org/) or use the [NVM PowerShell Module](https://www.powershellgallery.com/packages/nvm).
 
-Note: Karma currently works on Node.js **0.10**, **0.12.x**, **4.x**, **5.x**, **6.x**, and **7.x**. See [FAQ] for more info.
+Note: Karma currently works on Node.js **0.10**, **0.12.x**, **4.x**, **5.x**, **6.x**, **7.x**, and **8.x**. See [FAQ] for more info.
 
 ## Installing Karma and plugins
 

package.json

@@ -428,7 +428,7 @@
     "karma": "./bin/karma"
   },
   "engines": {
-    "node": "0.10 || 0.12 || 4 || 5 || 6 || 7"
+    "node": "0.10 || 0.12 || 4 || 5 || 6 || 7 || 8"
   },
   "version": "1.7.0",
   "license": "MIT",