Remove support for Node.js 4

Author: novemberborn

.travis.yml

@@ -2,6 +2,5 @@ language: node_js
 node_js:
   - '8'
   - '6'
-  - '4'
 before_install:
   - npm i -g npm

appveyor.yml

@@ -2,7 +2,6 @@ environment:
   matrix:
     - nodejs_version: '8'
     - nodejs_version: '6'
-    - nodejs_version: '4'
 install:
   - ps: Install-Product node $env:nodejs_version
   - npm install --global npm@latest

package.json

@@ -10,7 +10,7 @@
 		"url": "sindresorhus.com"
 	},
 	"engines": {
-		"node": ">=4"
+		"node": ">=6.12.3 <7 || >=8.9.4"
 	},
 	"scripts": {
 		"test": "xo && ava"

test.js

@@ -6,7 +6,7 @@ import dotProp from 'dot-prop';
 import test from 'ava';
 import m from '.';
 
-const get = dotProp.get;
+const {get} = dotProp;
 
 function run(pkg, additionalOpts) {
 	const filepath = tempWrite.sync(JSON.stringify(pkg), 'package.json');