Run test suite on TravisCI and fix Node 4 compatibility

.travis.yml

@@ -0,0 +1,9 @@
+language: node_js
+node_js:
+  - 4
+  - 6
+  - 8
+  - 10
+
+script:
+  - yarn test

index.js

@@ -46,7 +46,10 @@ module.exports = {
 }());`;
   },
 
-  serverMiddleware: function({ options, app }) {
+  serverMiddleware: function(config) {
+    let options = config.options;
+    let app = config.app;
+
     let self = this;
     // maintaining `baseURL` for backwards compatibility. See: http://emberjs.com/blog/2016/04/28/baseURL.html
     let baseURL = options.liveReloadBaseUrl || options.rootURL || options.baseURL;

package.json

@@ -17,16 +17,17 @@
   "author": "Robert Jackson",
   "main": "index.js",
   "scripts": {
-    "changelog": "lerna-changelog"
+    "changelog": "lerna-changelog",
+    "test": "qunit tests"
   },
   "dependencies": {
     "clean-base-url": "^1.0.0",
     "ember-cli-version-checker": "^2.1.2"
   },
   "devDependencies": {
     "express": "^4.16.3",
-    "lerna-changelog": "0.8.0",
-    "qunit": "^2.6.1"
+    "lerna-changelog": "^0.7.0",
+    "qunit": "~2.6.1"
   },
   "changelog": {
     "repo": "ember-cli/ember-cli-inject-live-reload",

tests/inject-live-reload-test.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const describe = QUnit.module;
 const it = QUnit.test;
 const express = require('express');