Use babel so that other babel code can extend exported classes

.gitignore

@@ -4,3 +4,5 @@ npm-debug.log
 *.swp
 .coffee
 api.json
+dist
+package-lock.json

.npmignore

@@ -1,10 +1,9 @@
 spec
 script
 src
-*.coffee
+lib
 .npmignore
 .DS_Store
 npm-debug.log
 .travis.yml
 .pairs
-.coffee

package.json

@@ -2,10 +2,10 @@
   "name": "event-kit",
   "version": "2.5.1",
   "description": "Simple library for implementing and consuming evented APIs",
-  "main": "./lib/event-kit",
+  "main": "./dist/event-kit",
   "scripts": {
-    "prepublish": "grunt shell:update-atomdoc atomdoc",
-    "test": "grunt test"
+    "prepublish": "babel lib --out-dir dist --presets @babel/env && grunt shell:update-atomdoc atomdoc",
+    "test": "jasmine-focused --captureExceptions --forceexit spec"
   },
   "repository": {
     "type": "git",
@@ -17,6 +17,9 @@
   "license": "MIT",
   "dependencies": {},
   "devDependencies": {
+    "@babel/cli": "^7.1.2",
+    "@babel/core": "^7.1.2",
+    "@babel/preset-env": "^7.1.0",
     "grunt": "^0.4.1",
     "grunt-atomdoc": "^1.0.0",
     "grunt-cli": "^0.1.8",

spec/composite-disposable-spec.js

@@ -1,5 +1,5 @@
-const CompositeDisposable = require("../lib/composite-disposable")
-const Disposable = require("../lib/disposable")
+const CompositeDisposable = require("../dist/composite-disposable")
+const Disposable = require("../dist/disposable")
 
 describe("CompositeDisposable", function() {
   let disposable1, disposable2, disposable3

spec/disposable-spec.js

@@ -1,4 +1,4 @@
-const Disposable = require("../lib/disposable")
+const Disposable = require("../dist/disposable")
 
 describe("Disposable", function() {
   it("does not try to execute disposalAction when it is not a function", function() {
@@ -23,7 +23,21 @@ describe("Disposable", function() {
     expect(disposalAction.callCount).toBe(1)
   })
 
-  describe(".isDisposable(object)", () =>
+  it('can be extended by ES5-style classes', () => {
+    function MyDisposable () {
+      // super
+      Disposable.apply(this, arguments)
+    }
+
+    MyDisposable.prototype = new Disposable()
+
+    let actionCalled = false
+    const disposable = new MyDisposable(() => { actionCalled = true })
+    disposable.dispose()
+    expect(actionCalled).toBe(true)
+  })
+
+  describe(".isDisposable(object)", () => {
     it("true if the object implements the ::dispose function", function() {
       expect(Disposable.isDisposable(new Disposable(function() {}))).toBe(true)
       expect(Disposable.isDisposable({ dispose() {} })).toBe(true)
@@ -32,5 +46,6 @@ describe("Disposable", function() {
       expect(Disposable.isDisposable(undefined)).toBe(false)
       expect(Disposable.isDisposable({ foo() {} })).toBe(false)
       expect(Disposable.isDisposable({ dispose: 1 })).toBe(false)
-    }))
+    })
+  })
 })

spec/emitter-spec.js

@@ -1,4 +1,4 @@
-const Emitter = require("../lib/emitter")
+const Emitter = require("../dist/emitter")
 
 describe("Emitter", function() {
   it("invokes the observer when the named event is emitted until disposed", function() {