ES2015ify and require Node.js 4

Author: sindresorhus

.editorconfig

@@ -7,6 +7,6 @@ charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
 
-[{package.json,*.yml}]
+[*.yml]
 indent_style = space
 indent_size = 2

.gitattributes

@@ -1 +1,2 @@
 * text=auto
+*.js text eol=lf

.travis.yml

@@ -1,10 +1,6 @@
 language: node_js
 node_js:
   - '6'
-  - '5'
   - '4'
-  - '0.12'
-  - '0.10'
-
 after_script:
   - 'cat ./coverage/lcov.info | ./node_modules/.bin/coveralls'

index.js

@@ -1,32 +1,30 @@
 'use strict';
-var objectAssign = require('object-assign');
-
-module.exports = function (options, fn, target) {
-	var chainables = options.chainableMethods || {};
-	var spread = options.spread;
-	var defaults = objectAssign({}, options.defaults);
+module.exports = (options, fn, target) => {
+	const chainables = options.chainableMethods || {};
+	const spread = options.spread;
+	const defaults = Object.assign({}, options.defaults);
 
 	function extend(target, getter, ctx) {
-		Object.keys(chainables).forEach(function (key) {
+		for (const key of Object.keys(chainables)) {
 			Object.defineProperty(target, key, {
 				enumerable: true,
 				configurable: true,
-				get: function () {
+				get() {
 					return wrap(getter, chainables[key], ctx || this);
 				}
 			});
-		});
+		}
 	}
 
 	function wrap(createOpts, extensionOpts, ctx) {
 		function wrappedOpts() {
-			return objectAssign(createOpts(), extensionOpts);
+			return Object.assign(createOpts(), extensionOpts);
 		}
 
 		function wrappedFn() {
-			var args = new Array(arguments.length);
+			let args = new Array(arguments.length);
 
-			for (var i = 0; i < args.length; i++) {
+			for (let i = 0; i < args.length; i++) {
 				args[i] = arguments[i];
 			}
 
@@ -45,7 +43,7 @@ module.exports = function (options, fn, target) {
 	}
 
 	function copyDefaults() {
-		return objectAssign({}, defaults);
+		return Object.assign({}, defaults);
 	}
 
 	if (target) {

package.json

@@ -10,10 +10,10 @@
     "url": "github.com/jamestalmage"
   },
   "engines": {
-    "node": ">=0.10.0"
+    "node": ">=4"
   },
   "scripts": {
-    "test": "xo && nyc --cache --reporter=lcov --reporter=text ava"
+    "test": "xo && nyc ava"
   },
   "files": [
     "index.js"
@@ -26,13 +26,16 @@
     "chainable",
     "fluent"
   ],
-  "dependencies": {
-    "object-assign": "^4.0.1"
-  },
   "devDependencies": {
-    "ava": "^0.14.0",
+    "ava": "^0.19.1",
     "coveralls": "^2.11.6",
-    "nyc": "^6.4.4",
-    "xo": "^0.15.1"
+    "nyc": "^10.3.2",
+    "xo": "^0.18.2"
+  },
+  "nyc": {
+    "reporter": [
+      "lcov",
+      "text"
+    ]
   }
 }

test.js

@@ -1,5 +1,5 @@
 import test from 'ava';
-import fn from './';
+import fn from '.';
 
 test('defaults and args are passed', t => {
 	t.plan(2);
@@ -83,7 +83,7 @@ test('this is preserved', t => {
 			notFoo: {foo: false},
 			bar: {bar: true}
 		}
-	}, opts => {
+	}, function (opts) {
 		t.is(this, ctx);
 		return opts;
 	}, ctx);
@@ -102,7 +102,9 @@ test('this is preserved correctly using prototypes', t => {
 			notFoo: {foo: false},
 			bar: {bar: true}
 		}
-	}, opts => [this, opts], Constructor.prototype);
+	}, function (opts) {
+		return [this, opts];
+	}, Constructor.prototype);
 
 	const c1 = new Constructor();
 	const c2 = new Constructor();
@@ -119,7 +121,7 @@ test('spread option spreads arguments', t => {
 		chainableMethods: {
 			foo: {foo: true}
 		}
-	}, function returnArgs() {
+	}, function () {
 		return Array.prototype.slice.call(arguments);
 	});