Require Node.js 6 (#84)

Author: forresst

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
+  - '10'
   - '9'
   - '8'
   - '6'
-  - '4'

index.js

@@ -59,7 +59,7 @@ class Ora {
 	}
 
 	frame() {
-		const frames = this.spinner.frames;
+		const {frames} = this.spinner;
 		let frame = frames[this.frameIndex];
 
 		if (this.color) {

package.json

@@ -10,7 +10,7 @@
 		"url": "sindresorhus.com"
 	},
 	"engines": {
-		"node": ">=4"
+		"node": ">=6"
 	},
 	"scripts": {
 		"test": "xo && ava"

test.js

@@ -68,7 +68,7 @@ test('`.id` is not set when created', t => {
 test('ignore consecutive calls to `.start()`', t => {
 	const spinner = new Ora('foo');
 	spinner.start();
-	const id = spinner.id;
+	const {id} = spinner;
 	spinner.start();
 	t.is(id, spinner.id);
 });