update dependencies using ember-cli-babel@6

Author: mansona

Diff for: package.json

@@ -62,7 +62,7 @@
     "broccoli-asset-rev": "^3.0.0",
     "broccoli-funnel": "^2.0.1",
     "broccoli-merge-trees": "^2.0.0",
-    "ember-a11y-testing": "^0.5.4",
+    "ember-a11y-testing": "^5.2.1",
     "ember-anchor": "^1.0.3",
     "ember-auto-import": "^2.7.2",
     "ember-cli": "~3.28.6",
@@ -71,7 +71,7 @@
     "ember-cli-babel": "^7.26.10",
     "ember-cli-bourbon": "^2.0.1",
     "ember-cli-browserstack": "^1.0.1",
-    "ember-cli-clipboard": "^0.8.1",
+    "ember-cli-clipboard": "^1.1.0",
     "ember-cli-dependency-checker": "^3.2.0",
     "ember-cli-deploy": "^1.0.1",
     "ember-cli-deploy-build": "^1.1.0",
@@ -91,16 +91,16 @@
     "ember-data-fastboot": "https://github.com/cardstack/ember-data-fastboot#6e6fb8bbf0b405ae174160cc1e4833c5582f68cd",
     "ember-export-application-global": "^2.0.1",
     "ember-fetch": "^8.1.1",
-    "ember-inflector": "^3.0.0",
+    "ember-inflector": "^4.0.3",
     "ember-load-initializers": "^2.1.2",
     "ember-maybe-import-regenerator": "^0.1.6",
     "ember-metrics": "^1.5.2",
     "ember-page-title": "^6.2.2",
-    "ember-power-select": "^6.0.1",
+    "ember-power-select": "^7.2.0",
     "ember-qunit": "^5.1.5",
     "ember-resolver": "^8.0.3",
     "ember-rfc176-data": "^0.3.17",
-    "ember-route-action-helper": "^2.0.5",
+    "ember-route-action-helper": "^2.0.8",
     "ember-showdown-shiki": "^1.2.1",
     "ember-sinon": "^4.1.1",
     "ember-source": "~3.28.8",