Drop support for Node.js 0.x

.travis.yml

@@ -1,9 +1,8 @@
 language: node_js
 node_js:
+  - '7'
   - '6'
   - '4'
-  - '0.12'
-  - '0.10'
 addons:
   apt:
     sources:
@@ -16,6 +15,4 @@ addons:
       - g++-4.9
 env:
   - CXX=g++-4.9
-before_install:
-  - npm explore npm -g -- npm install node-gyp@latest
 sudo: false

Readme.md

@@ -29,7 +29,7 @@ $ npm install canvas
 
 Unless previously installed you'll _need_ __Cairo__ and __Pango__. For system-specific installation view the [Wiki](https://github.com/Automattic/node-canvas/wiki/_pages).
 
-Currently the minimum version of node required is __0.10.0__
+Currently the minimum version of node required is __4.0.0__
 
 You can quickly install the dependencies by using the command for your OS:
 

package.json

@@ -39,7 +39,7 @@
     "standard": "^8.5.0"
   },
   "engines": {
-    "node": ">=0.10.0"
+    "node": ">=4"
   },
   "main": "./lib/canvas.js",
   "license": "MIT"