Update dependency ember-simple-auth to v2 (#1449)

Co-authored-by: Renovate Bot <renovatebot@gmail.com>

ghost/admin/app/adapters/base.js

@@ -14,10 +14,6 @@ export default RESTAdapter.extend(DataAdapterMixin, AjaxServiceSupport, {
         return false;
     },
 
-    authorize(/*xhr*/) {
-        // noop - we're using server-side session cookies
-    },
-
     query(store, type, query) {
         let id;
 

ghost/admin/package.json

@@ -89,7 +89,7 @@
     "ember-power-select": "2.3.5",
     "ember-resolver": "7.0.0",
     "ember-route-action-helper": "2.0.7",
-    "ember-simple-auth": "1.9.2",
+    "ember-simple-auth": "2.1.1",
     "ember-sinon": "4.1.1",
     "ember-source": "3.15.0",
     "ember-sticky-element": "0.2.3",

ghost/admin/yarn.lock

@@ -5798,10 +5798,10 @@ ember-router-generator@^2.0.0:
     "@babel/traverse" "^7.4.5"
     recast "^0.18.1"
 
-ember-simple-auth@1.9.2:
-  version "1.9.2"
-  resolved "https://registry.yarnpkg.com/ember-simple-auth/-/ember-simple-auth-1.9.2.tgz#ee8b1b0ec4c5c0e08bc94560cb90552d4ae7fd5d"
-  integrity sha512-WTG2uGe8+TIfwsy5eaS7uIszEmyQ/pjKLUMjyq6YYkU9d9erSXVRiuO4h46OxTEbVI3c17mjAu/4kTxc+BOFZw==
+ember-simple-auth@2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/ember-simple-auth/-/ember-simple-auth-2.1.1.tgz#c9624485193304f7767ce9a0c9353eae9a4f7325"
+  integrity sha512-VrX09hZGGk/PuDmaVDEfRf46tNBJF8FJR6nszvY3rmmB1+tGrzeyHOZTyY7+mcAQfsyZAS71gs6twjxYKCquGQ==
   dependencies:
     base-64 "^0.1.0"
     broccoli-file-creator "^2.0.0"