Introduce schema version in package.json

THis is to maintain compatibility between ember-cli-fastboot and fastboot.

Author: kratiahuja

.travis.yml

@@ -1,8 +1,8 @@
 ---
 language: node_js
 node_js:
-  - "5"
   - "4"
+  - "stable"
 
 env:
   - CXX=g++-4.8 WORKER_COUNT=2

lib/broccoli/fastboot-config.js

@@ -5,6 +5,8 @@ var md5Hex = require('md5-hex');
 var path   = require('path');
 var Plugin = require('broccoli-plugin');
 
+var LATEST_SCHEMA_VERSION = 1;
+
 function FastBootConfig(inputNode, options) {
   Plugin.call(this, [inputNode], {
     annotation: "Generate: FastBoot package.json"
@@ -157,6 +159,7 @@ FastBootConfig.prototype.toJSONString = function() {
     dependencies: this.dependencies,
     fastboot: {
       moduleWhitelist: this.moduleWhitelist,
+      schemaVersion: LATEST_SCHEMA_VERSION,
       manifest: this.manifest,
       hostWhitelist: this.normalizeHostWhitelist(),
       appConfig: this.appConfig

test/package-json-test.js

@@ -42,6 +42,12 @@ describe('generating package.json', function() {
       });
     });
 
+    it("contains a schema version", function() {
+      var pkg = fs.readJsonSync(app.filePath('/dist/package.json'));
+
+      expect(pkg.fastboot.schemaVersion).to.deep.equal(1);
+    });
+
     it("contains a whitelist of allowed module names", function() {
       var pkg = fs.readJsonSync(app.filePath('/dist/package.json'));