Merge pull request #1526 from bertdeblock/include-ember-destroyable-types

Include `@types/ember__destroyable` when running the default blueprint

Author: chriskrycho

ts/blueprints/ember-cli-typescript/index.js

@@ -157,6 +157,7 @@ module.exports = {
       '@types/ember__object',
       '@types/ember__service',
       '@types/ember__controller',
+      '@types/ember__destroyable',
       '@types/ember__string',
       '@types/ember__template',
       '@types/ember__polyfills',