update ember-power-select and ember-concurrency

Author: mansona

app/app.js

@@ -4,6 +4,7 @@ import loadInitializers from 'ember-load-initializers';
 import config from 'ember-api-docs/config/environment';
 
 import './deprecation-workflow';
+import 'ember-power-select/styles';
 
 export default class App extends Application {
   modulePrefix = config.modulePrefix;

app/styles/app.scss

@@ -43,9 +43,6 @@ body {
   }
 }
 
-
-@import "ember-power-select";
-
 // fix header
 @media (min-width: 992px) {
   nav.es-navbar div.container {

app/templates/application.hbs

@@ -10,3 +10,5 @@
 
 {{!-- required by ember-cli-meta-tags --}}
 <HeadLayout />
+
+<BasicDropdownWormhole />

package.json

@@ -63,11 +63,12 @@
     "broccoli-funnel": "^2.0.1",
     "ember-a11y-testing": "^5.2.1",
     "ember-anchor": "^1.0.3",
-    "ember-auto-import": "^2.7.2",
+    "ember-auto-import": "^2.10.0",
+    "ember-basic-dropdown": "^8.6.0",
     "ember-cli": "~3.28.6",
     "ember-cli-app-version": "^5.0.0",
     "ember-cli-autoprefixer": "^1.0.0",
-    "ember-cli-babel": "^7.26.10",
+    "ember-cli-babel": "^8.2.0",
     "ember-cli-bourbon": "^2.0.1",
     "ember-cli-browserstack": "^1.0.1",
     "ember-cli-clipboard": "^1.1.0",
@@ -85,7 +86,7 @@
     "ember-cli-showdown": "^9.0.1",
     "ember-cli-terser": "^4.0.2",
     "ember-composable-helpers": "^3.1.1",
-    "ember-concurrency": "^2.3.7",
+    "ember-concurrency": "^4.0.3",
     "ember-data": "~3.28.6",
     "ember-data-fastboot": "https://github.com/cardstack/ember-data-fastboot#6e6fb8bbf0b405ae174160cc1e4833c5582f68cd",
     "ember-export-application-global": "^2.0.1",
@@ -95,7 +96,7 @@
     "ember-maybe-import-regenerator": "^0.1.6",
     "ember-metrics": "^1.5.2",
     "ember-page-title": "^6.2.2",
-    "ember-power-select": "^7.2.0",
+    "ember-power-select": "^8.7.0",
     "ember-qunit": "^5.1.5",
     "ember-resolver": "^8.0.3",
     "ember-rfc176-data": "^0.3.17",